fluid when sent, and that evening sections were cut and mounted after short treatment with picro-carmine. Without examination two slides were sent to Sir Robert (we were busy on small-pox), who returned them with the remark, "Only muscular fibre." Dr. Bookey looked at me and I gazed upon him, we then subjected the slide to examination with water-immersion Powell and Leland and No. 2 eye-piece, all apparatus being Powell and Leland. I have seen reticulation since, but in a tumor purely epitheleomatous; it was simply wonderful. The cells were perfectly differentiated. and the reticulation was so regular that we at once forgave Sir Robert for his hasty conclusion. We hope to continue our investigations on amoeboid organisms; but, as the process is so long, my colleague persuaded me to send you these remarks. A. COWLEY MALLEY. Munslow, England. The Fundamental Hypotheses of Abstract Dynamics. I HAVE been prevented from making earlier reference to Mr. Dixon's letter in Science of Sept. 9, p. 149, criticising my address on the above topic, Science, Aug. 5, p. 71. The letter was especially interesting to me as I had not seen his paper, "On the Logical Foundations of Applied Mathematical Sciences," communicated to the Mathematical Society of London some few months ago. Mr. Dixon, taking the relativity of direction into account, seems to me to have proved that the Laws of Motion may be regarded as forming a definition of force. My argument to show that if they be so regarded, they are not in general consistent with one another, involved the specification of accelerations by reference to a single point, and thus assumed the possibility of determining directions absolutely. While valid, therefore, as against the writers to whom I referred, who make the same assumption, it has not the more general validity which I supposed. That I have regarded force as a non-relative conception, while Mr. Dixon has thus shown that it may be regarded as relative, would seem at first sight to place us in antagonism. It does not, however; for I have merely discussed certain points in connection with the laws of motion, employing the ordinary conception of force, and making no inquiry as to the assumptions involved in it, while Mr. Dixon proves that this conception must involve certain assumptions, and seeks to determine what they are. Mr. Dixon points out that it is the law of the conservation of mechanical energy only which is deducible from the assumption that stresses are functions of the distance between the particles on which they act, and that this law would not include the general law of the conservation of energy until all energy was shown to be mechanical. That is quite true; but it does not seem to affect my contention, that, since we are now so sure of the conservation of all forms of energy that the law of the conservation of mechanical energy is frequently assumed as itself axiomatic, the laws of motion, if they are to be retained as dynamical axioms, should be supplemented in such a way that this law would be deducible from them. Nor does the fact that the law of the conservation of energy is usually expressed at present in a form which is probably temporary seem to me to make this any the less desirable. The conception of potential energy may lose its utility as we gain clearer insight into dynamical phenomena. When that time comes we may have to modify our fundamental hypotheses to suit the clearer views which will have been gained; but in the meantime it seems none the less desirable that we should have axioms sufficient for the deduction of the law of conservation in its present form. There is, as Mr. Dixon supposes, an omission in the sentence of my paper which he found unintelligible. If commas be inserted after the words sum and masses, it will be found to state that, if m, and m ̧ be the masses of two particles, and a the relative acceleration produced by a stress between them, this stress may be shown to be proportional to applying the second law of motion, a particle of infinite mass be chosen as point of reference, all the forces acting on a system of particles, may be regarded as exerted upon them by the particle of infinite mass," these forces are supposed to be exerted in accordance with the third law of motion, which asserts action and reaction to be equal and opposite, but not to be in the line joining the particles acting on one another. I do not myself regard this fiction as of any importance. I mentioned it in passing because I wished to refer subsequently to Newcomb's assertion that the law of the conservation of energy assumes it. Mr. Dixon considers it inconvenient to include in one law of stress two statements resting on such very different evidence as that forces may be considered to be attractions or repulsions and that their magnitudes depend solely on the distances between the particles on which they act. I need hardly say, however, that I see no objection to enunciating the two statements in separate sentences. For educational purposes, indeed, it would certainly be well to enunciate what I have called the law of stress. piecemeal, as is invariably done in the case of what I have called the law of force. J. G. MACGREGOR. Dalhousie College, Halifax, N. S., Oct. 4. The Libyan Alphabet. I GLADLY accept Dr. Brinton's offer (Science, Sept. 30); only, if his object is truth rather than the scoring of a point, he will place in the editor's hands, not the Grammaire tamachek, which would be useless for the purpose, but the Grammaire kabyle, which alone contains the full forms of the three Berber alphabets, but which Dr. Brinton appears never to have seen. Even the Grammaire tamachek, now that he has got hold of it, he seems incapable of understanding. The other day he mistook diacritical marks for accents, and now he tells us that Hanoteau connects the Libyan and Semitic systems "solely " because both are read from right to left, even charging me with disingenuousness for suppressing this fact. The charge might stand, had I made the assertion, which is as wide of the mark as is Dr. Brinton's appeal to Hanoteau, on the question of accent. The very Berber name asekkil (pl. isekkilen) of the letters is equated by Hanoteau (p. 5) with the Arabic shakl and the Hebrew sākal, "forme, figure, dont les Grecs ont fait otyhaì," hence the French sigle. I am not defending these equations, but merely give them to show how ignorant Dr. Brinton still is of the contents of the Grammaire tamachek, which he had the temerity to insinuate I had never seen (Science, Aug. 19). May I ask Dr. Brinton who are the "French scholars" that regard the initial t as radical in the word tifinar, and that accent the word differently from Barth, for this also appears to be again insinuated? The recent death of M. E. Renan reminds me that that illustrious "French scholar" is also arrayed against Dr. Brinton, holding that the Punic origin of the Libyan alphabet is an established fact (Histoire des langues semitiques, 2d ed., p. 194. et seq.). Dr. Brinton is to be envied his possession of plenty of documents in tifinar." Such documents are excessively rare in Europe, and even amongst the Tuaregs themselves, who, apart from rock inscriptions, have never made any extensive use of this old and defective script. Considering the weakness of his position, Dr. Brinton shows as much want of tact as of bad taste in charging his opponent with lack of candor. A. H. KEANE. 79 Broadhurst Gardens, South Hampstead, N. W. Is There a Sense of Direction ? In his article on the "Sense of Direction," in Science of Oct. 7, Dr. Work says, "It is very well known that an unguided horse returning to familiar haunts will do so over the same route by which he left them, rather than in a direct line by sense of direction." An incident which came under my observation some six years ago directly contradicts this theory. My father had purchased a very intelligent mare about a month before, and on this occasion I hitched her single to a carriage, and drove to a town about fourteen miles distant. As the direction was almost due north-west, the road ran alternately west and north, there being about eight corners to turn. Although the mare might have been through the same region before, it is pretty certain that she had never travelled just the same road. Coming back I gave her her head, and she made every turn so as to keep the same road as on the going trip, with one exception. In that case she made a short-cut by a diagonal road across a quarter-section, striking the regular road a mile further on, and saving about a quarter of a mile. In going up I should have taken the same route, had I not had some business which required me to go the longer way. At the point where this road turned off, it led toward a hill which concealed its junction with the regular road. I certainly did nothing to guide the mare, and was astonished to see her take the short-cut. As Dr. Work has left considerable room for "accident," he may be able to dispose of this circumstance in that way, though I can scarcely accept such an explanation. J. M. ALDRICH. Brookings, S.D. THAT the sense of direction is feeble, if indeed present, in civilized man cannot be denied. I have had some experiences which lead me to suspect that it may be obsolescent rather than quite obsolete. It has frequently occurred that in coming into a strange town or city at night, when compelled to abandon all conscious effort to keep my direction, I have found that in some way I had not lost the points of the compass. These may have been happy accidents, but they may have been cases of unconscious orientation. Again, upon visiting a cave of considerable dimensions, I purposely refrained from any conscious effort in keeping the points of the compass, with the same result as in the preceding cases. To the foregoing I have added some inquiries, and a few observations upon others, and feel that there is some ground for thinking that there may be a feeble sense of direction still left to us, though so feeble as to be easily overborne by suggestion from the other senses. CHARLES E. BESSEY. University of Nebraska, Lincoln. On Biological Nomenclature. I AM glad to learn, from Dr. Coues's letter in Science, that the code of rules promulgated by the American Ornithological Union a few years ago has been rigidly enforced in that branch of biology, and has been found to work admirably in practice. I studied these rules at their appearance with much interest and attention, and have since, so far as possible, endeavored to adhere to them in my own writings, with one exception - that concerning the erection and definition of genera. As I see that the botanists are disposed to accept this same rule, I shall be glad if a wider discussion may be called out before it becomes established. I refer to canon xlii., which recognizes the validity of generic names unaccompanied by definition, if described species are pointed out as types. Among ornithologists, and perhaps among botanists, such a rule may not be productive of as much confusion and annoyance as is sure to be the case among entomologists. Generic characters are not, and should not be, included in specific descriptions; how then is it possible for the remote student to learn what nomina nuda mean, when it is impossible for him to study the types? He who studies only his own immediate fauna or flora, without a knowledge of the allied forms throughout the world, can never be very successful as a systematist, and, if we are to rely upon types, what is the good of a scientific nomenclature? Furthermore, in such a science as entomology, where there is still a tendency to look upon the manufacture of species and genera as the ultimum bonum of the systematist, the mere possibility of such a rule obtaining currency must have a tendency to foster superficiality, incompetence, and ignorance. While I do not agree wholly with those who look upon the genus as an abstract thing, over and above types, I do protest strongly against the acceptance of a rule that will relieve the namer from the necessity of knowing anything about the things he names. The fear of evil results is not a groundless one. Some years ago an Italian writer, with an assurance as boundless as his ignorance, brought forth a new "system" of dipterological classification, with hundreds of new names. Not the slightest attention has ever been paid to his "system;" but, with this rule in force, one would be bound to torture himself in trying to unravel its vagaries. The careless writer should have no such rule, the careful writer needs none. S. W. WILLISTON. University of Kansas, Oct. 18. Solid Glycerine. CAN you inform me, through your magazine, by what chemical, or by what process, glycerine may be solidified, retaining its transparency? Can any reader answer? C. C. SMITH. New York, Oct. 31. BOOK-REVIEWS. Fourteenth Annual Report of the State Board of Health of the State of Connecticut for the Year Ending November 30, 1891. New Haven, 1892. THIS report presents fresh evidence that the work undertaken by the various State boards of health is steadily increasing both in scope and in value. This encouraging condition of things has been brought about largely by the adherence of several States to the policy of employing competent expert service. The authorities of these States consider that scientific problems can be successfully attacked only by the most advanced scientific methods, and have in consequence availed themselves of the aid of highly trained chemists, biologists and engineers. A great impetus has been given in this way to the best kind of sanitary work. The Connecticut report contains, besides the usual reports from local boards of health and the annual statistics of births and deaths, several special features of more than ordinary importance and interest. Dr. H. E. Smith presents a special report upon "The Origin of Certain Cases of Typhoid Fever from Money Island." Twenty-one cases of typhoid, one of which proved fatal, were traced to the contaminated water used at a hotel on Money Island. From. . . facts concerning the sources of the water used, it appears that during the period August 11 to 14, at which time all of those subsequently taken ill were at the inn together, the drinking-water was obtained from the billiard-hall cistern." Dr. Smith shows further that abundant opportunity existed for the infection of this particular cistern water, and adduces convincing evidence that the water was actually infected by a case of " walking typhoid," and that the water thus infected spread the disease. Dr. L. S. DeForest, in his article upon "Tuberculosis as a Local and Contagious Disease in New Haven" discusses the interesting question of infected dwellings. Dr. DeForest found from the data of 1876-1890 three principal districts of concentration of tuberculosis in New Haven. From a detailed study of house cases he arrived at the conclusion that houses sometimes became true foci of infection. "We think that the accompanying maps and tables go far to show that consumption is endemic in certain parts of the city; that in these parts there are many houses in which it is distinctly dangerous to live." The value of Dr. DeForest's interesting paper would be considerably enhanced by the addition of exact references to the writings of Flick, Cornet, and the other workers in this same field. The report of the "Examination of Certain Connecticut Water Supplies," by Drs. Samuel W. Williston, Herbert E. Smith, and Thomas G. Lee, covers some two hundred pages and is illustrated with a number of well-arranged charts showing the monthly variations of the analyses. In some respects the report merely confirms the previous work of the Massachusetts State Board of Health, but in other respects it improves upon and extends the latter. Fifteen different water supplies were selected for study, and monthly examinations were made of most of these during a period of twenty-three months. The special report on the chemical examinations is by Dr. Smith, who in his methods follows closely the chemists of the Massachusetts staff. He, however, expresses his results in milligrams per litre rather than in parts per hundred thousand, and Inakes a few other minor clerical changes. The limited resources at his command did not permit him to take up carefully the interesting and important question of "normal chlorine;" but his chlorine determinations, so far as they go, support the work of Professor Drown. It is much to be desired that extended and accurate determinations of normal chlorine should be made in all parts of the country. The importance to the water-analyst of such knowledge has been clearly demonstratod by Professor Drown, and there seems no reason why boards of health should fail to take advantage of so useful a key to the purity of a water. Regarding the disagreeable odors and tastes which often arise in waters Dr. Smith coincides with Professor Drown in concluding that these phenomena are rarely due to putrefactive change, but are "the specific odors of certain organisms." The microscopical examinations were conducted under the charge of Dr. Williston, who used in his work the method devised by Professor Sedgwick, modifying it, however, in more or less important details. Valuable facts are here presented concerning the occurrence and relative abundance of the different groups of small aquatic organisms. A very interesting description is given of the trouble caused in the Meriden reservoir by the Volvox-like Uroglena. An epidemic of Uroglena has since broken out in several Massachusetts water-supplies, and new light upon the history of this obscure and troublesome organism may soon be hoped for. "In conclusion, it may be interesting to observe that on the average about seven thousand plants and animals, aside from the bacteria, are swallowed with every glassful of Connecticut reservoir water that is drank!" Dr. Lee reports upon the microscopical examination for 1890-91 and also upon the bacteriological examination for the two years covered by the report. The bacterial examination of the reservoir waters reveals some interesting facts. "The periods of greatest number [of bacteria] were principally during the fall months, while the smaller numbers were largely during the summer months." There is a decrease in the numbers in both February and March, the months of melting snow. It is evident that extended and systematic bacterial analyses of this character are still greatly needed, and it is to be hoped not only that Connecticut will enlarge this branch of the work, but that the Massa CALENDAR OF SOCIETIES. Society of Natural History, Boston. Nov. 2.-George L. Goodale, Certain Aspects of the Vegetation of New Zealand. chusetts authorities will find it possible to make an early beginning in this same field. The specific bacteria commonly found in Connecticut waters were studied by Dr. Charles J. Foote, who describes in this report sixteen forms. The species are not named, and the author says "No attempt at identification has . . . been made, since the data in most cases seemed insufficient to warrant it." This, we think, is a fact to be regretted. The species "XXI.," for example, might perhaps have turned out to be Bacillus janthinus if a few more facts regarding it had been obtained. Attempts to identify, however unsatisfactory in themselves, lead to the accumulation of new data and result in more adequate descriptions. The growth of the different species in gelatin is described with more than usual discrimination, and with the use of several apt comparisons. A valuable study of the Connecticut River by Dr. Smith concludes the report. The Hygienic Treatment of Consumption. By M. L. HOLBROOK, M.D. New York, M. L. Holbrook & Co. By far the larger part of this book is devoted to the discussion of the prevention and treatment of consumption in its earlier stages. Under this head are given the author's views upon suitable exercises for persons of consumptive tendencies, upon clothing, climate, baths, and other familiar topics. These subjects are in the main handled with common sense and with perhaps more than the usual freshness of illustration. The author calls attention to the dangerous weakening of the constitution arising from an incessant course of "colds," and gives some sensible practical suggestions for individual hygiene. The connection of colds with indigestion is clearly recognized. "Overloading the stomach with indigestible food is a frequent cause of colds. It is far better to wait a little before eating if one is very tired, or to eat slowly and moderately, so as to give the stomach time to regain its power" (p. 44). Exchanges. [Free of charge to all, if of satisfactory character. Address N. D. C. Hodges, 874 Broadway, New York.] For Exchange-"The Birds of Kansas,"-Goss, for Gray's Anatomy, or Medical Dictionary. Must be in good condition. Address, J. H. SIMPSON, Buch Philosophical Society, Washington. Oct. 29-A. W. Harris, Agricultural Ex-tel College, Akron, Ohio. periment Station Exhibit by the Department of Agriculture at the World's Fair; C. D. Walcott, Notes on the Lower Paleozoic and the later volumes of Silliman's Journal, upon of iron and steel. Complete or special courses apMETALLURGICAL CHEMIST Venice tion in the metallurgy and chemical analysis Rocks Between the Susquehanna and Poto-logie. vols. Nearly 5,000 figures, some hand-col-plying to the manufacture of pig irons and steels, as mac Rivers; T. Russell, Relation of RainFall to River Rise; W. Harkness, Flexure of Telescope Tubes. Publications Received at Editor's Office. ACLAND, SIR HENRY W. The Inaugural Robert Boyle Lecture. Oxford, Henry Frowde. 12°. Paper. 45 p. ALLEN, HARRISON. On a New Sub-family of Phyllostome Bats. Washington, Government. 8°. Paper. 7 p. BAILEY, M.A. American Mental Arithmetic. New York, American Book Co. 16°. 160 p. 35 cts. BAKER & Co. Data Concerning Platinum, etc. Newark, Baker & Co. 11 p. DOUGHTY, FRANCIS F. Evidences of Man in the Drift. New York, Privately Printed. 8°. Paper. 18 p. HURST, J. T. Tables and Memoranda for Engineers. 11th ed. New York, Spon & Chamberlain. 132 p. 50 cts. JAMES, BUSHROD W. ALASKANA. Philadelphia, Porter & Coates. 12°. 386 p. LUBBOCK, SIR JOHN. The Beauties of Nature. New York, Macmillan & Co. 12°. 443 p. $1.50. NADAILLAC, MARQUIS DE. Manners and Monuments of Prehistoric Peoples. Trans. by Nancy Bell. New York, G. P. Putnam's Sons. 8°. 424 p. ill. $3. PEDDIE, WILLIAM. A Manual of Physics. New York, G. P. Putnam's Sons. 12°. 513 p. Ill. $2.50. SIMPSON, CHARLES T. Notes on the Unionidae of Florida and the Southeastern States. Washington, Government. 8°. Paper. 31 p. Ill. TRUE, FREDERICK W. Annotated Catalogue of Mammals Collected by W. L. Abbott. Washington, Government. 8°. Paper. 35 p. Ill. like to receive cash offers, or an offer in exchange minerals and shells. Mich., Sept., 1892. Exchange. I have the finest shells of Anodonta corpulenta, C'p'r, and Suborbiculata, Say, in the world. Will exchange for fresh water, land, and also for exchange 50 varieties of fresh water and marine shells, in large or small quantities. Have land shells from Spoon River, Ill. DR. W. S. STRODE, Lewistown, Ill. Reading Matter Notices. well as to their uses. Address" METALLURGIST,” care SCIENCE. A GRADUATE of the University of Pennsylvania and a practical mineralogist of twenty years' experience desires to give his services and a cabinet of 25,000 specimens, all named, with about the same number of duplicates, in minerals, crystals, rocks, gems, fossils, shells, archæological and ethnological specimens and woods to any institution desiring a fine outfit for study. The owner will increase the cabinet to 50,000 specimens in two years and will act as curator. Correspondence solicitedfrom any scientific institution. J. W. Hortter, M.D., Ph.D., San Francisco, Cal., General P. 0. Delivery. WANTED. A position as zoological artist in con rection with a scientific expedition, institution or individual investigations. Experienced in microscopic and all scientific work. References given if desired. Address J. HENRY BLAKE, 7 Prentiss Place, N. Cambridge, Mass. HEMIST AND ENGINEER, graduate German position in laboratory or chemical works. Address 213 E. 7th Street, New York, care Levy. The American Geologist for 1892. Edited by PROF. S. CALVIN, University of Iowa; DR. E. W. CLAYPOLE, Buchtel College; JOHN EYERMAN, Lafayette College; DR. PERSIFOR FRAZER, Penn. Hort. Soc.; PROF. F. W. CRAGIN, Colorado College; PROF. ROB T T. HILL, U. S. Irrigation Survey; DR. ANDREW C. LAWSON. University of California; R. D. SALISBURY, University of Wisconsin; JOSEPH B. TYRRELL, Geol. Sur. of Canada; E. O. ULRICH, Minnesota Geological Survey: PROF. I. C. WHITE, University of West Virginia; PROF. N. H. WINCHELL, University of Minnesota. Now in its IXth volume. $3.50 per year. Sample copies, 20 cents. Address THE GEOLOGICAL PUBLISHING CO., Minneapolis, Minn. We question if every one would regard rowing in quite as favorable light as does our author. Paddling in a canoe, which is in many respects a much superior exercise, is unmentioned. Lawn-tennis, also, which is one of the best tools of recreative hygiene, does not find a place in our author's discussion. Horseback riding gets its full due as an admirable form of combined diversion and exercise. Throughout this portion of the book the value of good digestion as an aid to good nutrition is justly insisted upon; and exercise is conservatively regarded as simply a means to the welfare of the whole organism and not as an end in itself. It seems to us that the author does not emphasize as much as is desirable the means of prevention advocated by many professional bacteriologists. The destruction of tuberculous sputum, if any sort of concerted action can be obtained, will go far towards diminishing the chances of infection. The herding together of the consumptives at "health resorts," and the journeys thither in cars infected by their tuberculous predecessors are raising many serious problems. It will seem to many readers that this side of our author's subject receives inadequate attention. Physical Education in the Public Schools. By R. ANNA MORRIS. New York, American Book Company. THIS little manual, designed for the use of teachers in the public schools, is well worth reading by all those who have anything to do with the training of children. It contains a simple yet complete course of instruction in school gymnastics, including a brief description of the Delsartian principles of elocution and expression. The author has not confined herself to any one system of calisthenics, but has selected and adapted the movements of several well-known systems. The exercises have been arranged to cover a period of time included by the kindergarten and succeeding grades through the high-school, and consist of a regular progression of movements. The principal idea is that of training and not straining the Dyspepsia Dr. T. H. Andrews, Jefferson Medical College, Philadelphia, says of Horsford's Acid Phosphate. body. Many of the exercises may be taken between the rows of desks, or in the front of the school-room, without the aid of other apparatus than wands, rings, dumb-bells, and clubs. Especial attention is paid to the discussion of the best methods for inducing the correct breathing and carriage of the pupils. The high importance of good ventilation of the school-room is also emphasized. There is included a chapter on temperance-teaching in the public schools, which may give some useful hints. Finally, a brief course of instruction in reading aloud is outlined, and the manual is completed with a few selections of marches and other music adapted to the accompaniment of the calisthenics. The book contains illustrations and explanatory figures throughout. AMONG THE PUBLISHERS. MACMILLAN & Co. announce the issue of a collection of papers by the late Sir Daniel Wilson, entitled "The Lost Atlantis, and Other Ethnographic Studies." It contains essays on Trade and Commerce in the Stone Age, The Esthetic Faculty in Aboriginal Races, Hybridity and Heredity, etc. In the same line as Miss Jordan's "College for Women," published in the last number of the Atlantic Monthly, there is in the November number an article by Samuel W. Dike, LL.D., entitled "Sociology in the Higher Education of Women." The author discusses the subject at length, and shows that now the problem is to put the education that young women are getting into its true relation to their future, and to do more to equip the girl for what may be called the great profession of being a woman in her social trinity of wife, mother, and member of society. The many suggestions for the carrying-out of this problem make this paper a valuable one. Among other articles in this number may be mentioned Theodore Bacon's "Some Breton Folk-Songs " and a timely political article, "The Two Pro grammes of 1892." RACES AND PEOPLES. By DANIEL G, BRINTON, M.D. "The book is good, thoroughly good, and will long remain the best accessible elementary ethnography in our language."-The Christian Union. "We strongly recommend Dr. Brinton's Races and Peoples' to both beginners and scholars. We are not aware of any other recent work on the science of which it treats in the English language." -Asiatic Quarterly. "His book is an excellent one, and we can heartily recommend it as an introductory manual of ethnology."-The Monist. "A useful and really interesting work, which deserves to be widely read and studied both in Europe and America."-Brighton (Eng.) Herald. "This volume is most stimulating. It is written with great clearness, so that anybody can under grasps very well the complete field of humanity."The New York Times. "A wonderful remedy which gave me most gratifying results in the worst measurements with an indescribable charm of narforms of dyspepsia." "Dr. Brinton invests his scientific illustrations and ration, so that 'Races and Peoples,' avowedly a rec ord of discovered facts, is in reality a strong stimulant to the imagination."-Philadelphia Public Ledger. "The work is indispensable to the student who requires an intelligent guide to a course of ethnographic reading."-Philadelphia Times. Price, postpaid, $1.75. THE AMERICAN RACE. By DANIEL G. BRINTON, M.D. "The book is one of unusual interest and value."— Inter Ocean. "Dr. Daniel G. Brinton writes as the acknowledged authority of the subject."-Philadelphia Press. "The work will be of genuine value to all who wish to know the substance of what has been found out about the indigenous Americans."-Nature. "A masterly discussion, and an example of the successful education of the powers of observation." -Philadelphia Ledger. Price, postpaid, $2. N. D. C. HODGES, 874 Broadway, N. Y. GRIGGS' GERMAN PHILOSOPHICAL CLASSICS TO THOSE INTERESTED IN SCIENCE. For English Readers and Students. 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What is Said of the Series. ""Griggs' Philosophical Series' is the most valuable philosophical publication for popular purposes which has appeared in this country. It is not a mere translation or republication of the great German masters, but a critical exposition."—Christian Intelligencer, New York. "The publication of these hand-books marks an epoch in the history of philosophical studies in this country, and should be encouraged."-Boston Advertiser. These excellent books, as remarkable for ability as for clearness, will do much to clear the way, and make the mastery of the German systems a comparatively easy task."-New York Examiner. "This philosophical series, which would do credit to the press of Leipzig or Oxford, says much for the progress of philosophical study in America."Canadian Methodist Magazine, Toronto. "This Series of Philosophical Classics, edited by Prof. George S. Morris, of Michigan, and published in the enterprising city of Chicago, deserves to be much better known than it has hitherto been to students of German philosophy on this side of the Atlantic. The exposition of the work taken in hand is full and minute."-Mind, London, Eng. "One of the most valuable literary enterprises of the day. Each volume is a condensed presentation made by an author who combines thorough philosophical study with literary talent, and who has made a specialty of the philosopher whose work is interpreted."-Boston Traveller. "This series is one of those educational works in Barnes, Charles Reid, Madison, Wis. Beauchamp, W. M., Baldwinsville, N.Y. Anatomy, The Teaching of, to Advanced Medical Bolley, H. L., Fargo, No. Dak. Students. Anthropology, Current Notes on. Architectural Exhibition in Brooklyn. Arsenical Poisoning from Domestic Fabrics. Artesian Wells in Iowa. Astronomical Notes. Bacteria, Some Uses of. Bird on Its Nest, The. Birds Breeding at Hanover, N. H. Botanists, American and Nomenclature. Collection of Objects Used in Worship. Dynamics, Fundamental Hypotheses of. Etymology of two Iroquoian Compound Stems. Eyes, Relations of the Motor Muscles of, to Certain Fossils, Notice of New Gigantic. Glacial Phenomena in Northeastern New York. Hemiptercus Mouth, Structure of the. Infant's Movements. Bolles, Frank, Cambridge, Mass. Davis, W. M., Harvard College, Cambridge, Mass. Fessenden, Reginald A., Lafayette, Ind. Flexner, Simon, Johns Hopkins, Baltimore, Md. Foshay, P. Max, Rochester, N. Y. Gallaudet, E. M., Kendall Green, Washington, D.C. Golden, Katherine E., Agric. College, Lafayette, Ind. Hale, George S., Boston, Mass. Hale, Horatio, Clinton, Ontario, Canada. Hall, T. Proctor, Clark University, Worcester, Mass. Haynes, Henry W., Boston Mass. Hazen, H. A., Weather Bureau, Washington, D.C. Hewitt, J. N. B., Bureau of Ethnol., Washington, Howe, Jas. Lewis, Louisville, Ky. Hubbard, Gardiner G., Washington, D.C. Influenza, Latest Details Concerning the Germs of. Jackson, Dugald C., Madison, Wisconsin Insects in Popular Dread in New Mexico. Klamath Nation, Linguistics. Palenque Tablet, a Brief Study of. James, Joseph F., Agric. Dept., Washington, D.C. Johnson, Roger B., Miami University, Oxford, 0. Keane, Á. H., London, England. Kellerman, Mrs. W. A., Columbus, O. Kellicott, D. S., State University Columbus, O. Lintner, J. A., Albany, N. Y. Marshall, D. T., Metuchen, N.J. Mason, O. T., Smithsonian Inst., Washington, D. C. Physa Heterostropha Say, Notes on the Fertility of. Nuttall, George H. F., Johns Hopkins, Baltimore Pict's House, A. Pocket Gopher, Attempted Extermination of. States. Rice-Culture in Japan, Mexico and the United Tiger, A New Sabre-Toothed, from Kansas. which every friend of sound learning bas an inter- Trachea of Insects, Structure of. est."-New York Independent. These books are bound in uniform style, in brown silk cloth. The eight volumes, put up in a neat paper box, will be sent, express paid, on receipt of $10, by the publishers. S. C. GRIGGS & CO.. 262 and 264 Wabash Ave., Chicago. Vein-Formation, Valuable Experiments in. Will, a Recent Analysis of. I, 1892. Aaron, Eugene M., Philadelphia, Pa. Md. Oliver, J. E., Cornell University, Ithaca, N.Y. Sanford, Edmund C., Clark Univ., Worcester, Mass Slade, D. D., Museum Comp. Zool., Cambridge, Mass Ward, R. DeC., Harvard Univ., Cambridge, Mass |