side, it is proved by my statements that in this peculiarity both the Dresden Codex and the Palenque tablet differ from the Codex Troano-Cortez. For in the latter document the beginning of the years is in the days kan, muluc, ix, cauac. This is proved by Codex Troano 23-20, when compared with the Dresden Codex 25-28. From this, and the general character of the Codex TroanoCortez, we may safely infer that this manuscript is of a later date than the Dresden Codex, and, perhaps, of a somewhat different locality. Alluding to 9 C 9 D of the Palenque tablet, Professor Thomas remarks that on plate 48 and twice on plate 50 of the Dresden Codex no number-symbol is attached where the day is the twentieth of the month. This is obviously an erroneous statement; for in all the three cases named, and also in the Palenque tablet, there is a particular element attached to the hieroglyph of the month; and this particular element reveals itself as a graphic representation of the two eyes of the man (uinic), the substitute of the head of the slain, which I have shown is the usual representation of the man (uinic) or the number twenty (uinal) (see Zeitschrift für Ethnologie, XIX., pp. 237-240. With reference to Professor Thomas's last remarks, I will add that the symbol of the hand, as it is seen in the hieroglypth mänik, is to be understood as a sign-language character for "to eat," and therefore has the phonetic value chi (compare the hieroglyph chikin, west). The figure of the outstretched hand occurs as a substitute for the hatchet, the probable expression of the sound ch'ac, "to cut." The proper phonetic and figurative value of the outstretched hand seems to be pax, "to beat." DR. ED. SELER. Steglitz, Germany, June, 1892. A Grape Vine Produces Two Sets of Leaves During the Same Season. THE scarcity of information upon the production of leaves at abnormal times furnishes an excuse for the following communication. In the yard adjoining me there is a large grape-vine of several years' growth. A month ago this was a vigorous plant; the leaves were numerous and healthy, and the branches were loaded with grapes. About that time numerous caterpillars attacked the vine, and in less than a week there was not a leaf left upon it. Numerous petioles, bearing fragments of the principal veins, were all that remained of the foliage. The grapes began to shrivel, and the smaller twigs to show signs of premature decay. But the end was not yet. About a week after the leaves were destroyed, buds located at the nodes - buds which normally would have remained dormant until next year began to develop a second foliage. Although not yet full-grown, these leaves have given a new lease of life to the vine. The few shriveled bunches of grapes that have survived the great draught upon their moisture are rapidly regaining their plumpness. The plant is itself again. One fact is worth noting; although almost four weeks have elapsed since the leaves were destroyed, the petioles remain attached to the stems. These petioles are as green as ever, and in most cases they retain short bits of the principal veins of the leaves Near the petioles these veins are green, but their free extremities are shriveled and brown. C. H. TURNER. relics of the Paleolithic period; he assumes that the weapons of the river drift were more ponderous than those of later date; he asserts that no idols have been recovered from the stations of that epoch; and that no human remains have been unearthed from the European kitchen-middens. Our countrymen will also be surprised to learn that Mound City is another name for St. Louis (p. 142). In spite of such slight blemishes, the book can be recommended as a convenient and usually accurate manual of this attractive science. It begins at the beginning, tracing the story of man from early post-tertiary times through the drift and cave periods in Europe, and the neolithic, bronze, and iron ages. There are special chapters on the lake-dwellers, fossil man, myths, pottery, sepulture, and art, and one on the mound-builders of the Ohio Valley. Journal and Proceedings of the Royal Society of New South Wales. Vol. XXV. 1891. 348 p. THE creditable publications of this active society have already reached their twenty-fifth volume, and it comes replete with entertaining material. Several reports from the Sydney Observatory on celestial photography will have interest for the astronomer; articles on Kaolinite and the microscopic structure of Australian rocks will attract the geologist; the causes of death among sheep and rabbits in Australia will be welcome to the agriculturist; the folk-lorist will turn with pleasure to Mr. Pratt's translations of songs and myths from Samoa; while the mechanicians and cranks will be glad to read about a ship which can be propelled by the action of the waves alone, and a flying machine which is to navigate the sky by the motive power of compressed air. This is certainly a varied repast, at which each may find a dish to his liking. AMONG THE PUBLISHERS. A WORK on the "Migration of Birds," by Charles Dixon, will shortly be published by Messrs. Chapman & Hall. Messrs. Longmans, Green, & Co. have issued a third edition, revised and enlarged, of Professor E. A. Schäfer's " Essentials of Histology." The intention of the author is to supply students with directions for the microscopical examination of the tissues. A Dictionnaire de Chimie industrielle" is being issued in parts, under the direction of A. M. Villon, by the “Librairie Tignol." It gives an account of the applications of chemistry to metallurgy, agriculture, pharmacy, pyrotechnics, and the various arts and handicrafts. - Henry Stevens & Son, 39 Great Russell Street, London, promise for next month Henry Harisse's "Discovery of North America: a critical, documentary, and historic investigation, with an essay on the early cartography of the New World,” etc. This important work by the foremost investigator in the field will make a quarto volume of 800 pages, with 23 plates and many illustrations in the text, and will be issued to subscribers in three styles, ranging in price from £5 to £12 16s. Only 360 copies are to be printed. 66 - The American Society for the Extension of University Teaching, Philadelphia, has just issued five monographs on various phases of the university extension movement, being reprints from the Proceedings of the Society. These are: The Place of University Extension in American Education," by William T. Harris, U. S. Commissioner of Education; The Organization and Function of Local Centres," by Michael E. Sadler, secretary of the Oxford University Extension Delegacy; "The Church and University Extension," by Rev. John S. Macintosh; "The Ideal Syllabus," by Henry W. Rolfe; and "The University Extension Class," by Edward T. Devine. With the number for July, the "Annals" of the American Academy of Political and Social Science begins its third volume. The first article in the current number is entitled "Cabinet Government in the United States." It is by Professor Freeman Snow of Harvard, and is an answer to the many pleas for the adoption in the United States of cabinet government as known abroad. are articles by Mr. B. F. Hughes on "Basis of Interest," by Leo - W. H. Lowderwilk & Co., Washington, announce that they have assumed the publication of “Hickcox's Monthly Catalogue of Government Publications," which they will complete up to date and issue regularly and promptly in the future. Mr. Hickcox will edit the catalogue as heretofore, but all rights in the work have been purchased by the publishers. Up to this time the work has been prosecuted under many difficulties, and the pecuniary returns have been very inadequate, by reason of which facts it was not kept up with the regularity which its importance demanded. It is expected to issue early in July the first six num Publications Received at Editor's Office. 285 p. $1.25. bers of 1892, under one cover, succeeding numbers to follow early in each month thereafter. As rapidly as the matter can be prepared the back volumes will be completed and sent to subscribers. It is not expected that the undertaking will prove a remunerative one, but it is hoped that there will be a return sufficient to repay the actual outlay of money. The work is of the utmost value to every person who has occasion to handle or consult the current publications of the government, and these publications are now so varied and comprehensive that persons interested in any branch of science or business must appreciate it. Under the title of "The Cambridge Natural History," Macmillan & Co. have in active preparation an important series of volumes on the Natural History of Vertebrate and Invertebrate Animals, edited, and for the most part written, by Cambridge men. While intended in the first instance for those who bave not had any special scientific training, the volumes will, as far as pos sible, present the most modern results of scientific research. Thus the anatomical structure of each group, its development, palæontology, and geographical distribution, will be considered in conjunction with its external character. Care will, however, be taken to avoid technical language as far as possible, and to exclude abstruse details which would lead to confusion rather than to instruction. The series will be under the general editorship of Mr. J. W. Clark, the university registrar, and Mr. S F. Harmer, superintendent of the Museum of Zoology. The following writers Exchanges. [Free of charge to all, if of satisfactory character. Address N. D. C. Hodges, 874 Broadway, New York.] Wants BUSH, GEORGE G. History of Higher Education in Any person seeking a position for which he is quali Massachusetts. Washington, Bureau of Educahed by his scientific attainments, or any person seeking tion. 8°, paper. 455 p. some one to fill a position of this character, be it that Taxidermist going out of business has quantity of HUNTER-DUVAR, JOHN. The Stone, Bronze and Iron Ages. New York, Macmillan & Co. 12° finely-mounted specimens of North American birds, of a teacher of science, chemist, draughtsman, or what not, may have the Want' inserted under this head mammals and reptiles and skies of birds for sale, FREE OF COST, if he satisfies the publisher of the suitMAYO, A. D. Southern Women in the Recent Edu- including a full local collection of bird skins, show-able character of his application. Any person seeking Icational Movement in the South. Washington, ing some great variations of species; also quantity | information on any scientific question, the address of auy scientific man, or who can in any way use this column for a purpose consonant with the nature s the paper, is cordial y invited to do so. skulls with horns of deer and mountain sheep, Canada. JOHNS HOPKINS a Bureau of Education. 8°, paper. 330 p. MERZ, CHARLES H. Influenza. Sandusky, O. Beecher & Co., Printers. 12°, paper. 96 p. U. S. DEPARTMENT OF AGRICULTURE. Foods and Food Adulterants. Part 7: Tea, Coffee and Cocoa Preparations. Washington, Government. For exchange.-A fine thirteen-keyed flute in leather A position 40 instructorate (1803) desires d 8°, paper. -Experiments with Sugar Beets in 1891. Wash-covered case. for a photograph camera suitable for mak-physics. Address, A. B. TURNER, Johns Hopkins ing lantern slides. Flute cost $27, and is nearly new. University, Baltimore, Md. ington, Government. 8°, paper. -Record of Experiments with Sorghum in 1891. U. (. COX, Mankato, Minn. Washington, Government. 8°, paper. WEISMANN, AUGUST Essays upon Heredity. Trans. by E. B. Poulton and A. E. Shicley. Vol. II. Oxford, Clarendon Press. 12°. 236 p. Reading Matter Notices. Ripans Tabules: for torpid liver. Ripans Tabules banish pain. Societas Entomologica. International Entomological Society, rich-Hottingen, Switzerland. Annual fee, ten francs. Te exchange: Experiment Station bulletins and reports for bulletins and reports not in my file. I will send list of what I have for exchange. P. H. ROLFS, Lake City, Florida. Finished specimens of all colors of Vermont marble for fine fossils or crystals. Will be given only for valuable specimens because of the cost of polishing. GEO. W. PERRY, State Geologist, Rutland, Vt. WANTED-A collection of postage stamps; one made previous to 1870 preferred. Also old and curious stamps on original letters, and old entire U S. stamped envelopes. Will pay cash or give in exchange first-class fossils, including fine crinoids. WM. F. E. GURLEY, Danville, Ill. WANTED.-To purchase laboratory outfit; balaces, evaporating dishes, burettes, etc.. wanted immediately for cash. C. E. SPEIRS, 23 Murray street, New York. P. O. Box 1741. WANTED.-The services of a wide-awake young man, as correspondent, in a large manufactur ing optical business; one preferred who has a thor ough knowledge of microscopy and some knowledge of photography. Address by letter, stating age and references. Optical, care of Science, 874 Broad way, New York. For exchange.-Three copies of "American State Papers Bearing on Sunday Legislation," 1891, 82.50, new and unused, for "The Sabbath," by Harmon Kingsbury, 1840; "The Sabbath." by A. A Phelps, 1842; History of the Institution of the Sabbath Day, Its Uses and Zu-Abuses," by W. L. Fisher, 1859;Humorous Phases of the Law, by Irving Browne; or other works amounting to value of books exchanged, on the question of governmental legislation in reference to religion. personal liberty, etc. If preferred. I will sell "American State Papers," and buy other books on the subject. WILLIAM AD-Providing we can t ade other books and maga ANTED. We want any and 11 of the following, DISON BLAKELY, Chicago, Ill. zines or buy them cheap for cash: Academy, London, vol. 1 to 28, 35, Jan. and Feb., '89; Age of Steel, vol. 1 to 66; American Antiquarian, vol. 1, 2; American Architect, vol. 1 to 6, 9; American Art Review, vol. 3; American Field, vol. 1 to 21: American Geologist, vol. 1 to 6; American Machinist, vol. 1 to 4: Art Amateur, vol. 1 to 7, O t., 4; Art Interchange, vol 1 to 9; Art Union, vol. 1 to 4, Jan., 44, July, 45; Bibliotheca Sacra, vol 1 to 46; Godey's Lady's Book, vol. 1 to 20; New Englander, vol. 11: Zoologist, Series 1 and 1, Series 3 vol. 1 to 14; Allen Armeudale (a novel). Raymer's Old Book" Store, 243 4th Ave. S., Minneapolis, Minn. The Journal of the Society appears twice a month, and consists entirely of original articles on entomology, with a department for advertisements. All members may use this department free of cost for advertisements relating to entomology. The Society consists of about 450 members in all countries of the world. The new volume began April 1, 1892. The numbers already issued will be sent to new members. For information address Mr. FRITZ RUHL, President of the Societas Entomologica, Zurich-Hottingen, Switzerland. SCIENCE CLUBBING RATES. 10% DISCOUNT. We will allow the above discount to any subscriber to Science who will send us an order for periodicals exceeding $10, counting each at its full price. N. D. C. HODGES, 874 Broadway, N. Y. For Sale or Exchange for books a complete private chemical laboratory outfit. Includes large Becker balance (200g to 1-10mg),, platinum dishes and crucibles. agate motors, glass-blowing apparatus, etc. For sale in part or whole. Also complete file of Silliman's Journal. 1862-1885 (62-71 bound); Smithsonian Reports, 1854-1883; U. S. Coast Survey 1854-1869. Full particulars to enquirers. F. GARDINER, JR., Pomfret, Conn. Wanted, in exchange for the following works, any standard works on Surgery and on Diseases of Children: of the Northwest" and "Bids of the Colorado Valley," Wilson's "American Ornithology," 3 vols.; Coues' "Birds 2 vols.; Minot's Land and Game Birds of New England; Samuels' "Our Northern and Eastern Birds;" all the Reports on the Birds of the Pacific R. R Survey, bound in 2 vols., morocc; and a complete set of the Reports of the Arkansas Geological Survey. Please give editions and dates in corresponding. R. ELLSWORTH CALL, High School, Des Moines, Iowa. To exchange Wright's "Ice Age in North America" for "Darwinism," by A R. Wallace. Origin of Species." and Le Conte's "Elements of Geology" (Copyright 1882) by Darwin. "Descent of Man." by Darwin, Man's Place in Nature," Huxley, "Mental Evolution in Animals." by Romanes, "Pre-Adamites," by Winchell. No books wanted except latest editions, and books in good condition. C. S. Brown, Jr., Vanderbilt University, Nashville, Tenn. are engaged upon the groups which precede their names: Mammals, Mr. J. J. Lister; Birds, Mr. A. H. Evans; Reptiles and Amphibia Dr. Gadow, F.R.S.; Fish, Mr. W. Bateson; Mollusca, Mr. A. H. Cooke; Polyzoa, Mr. S. F. Harmer; Brachiopoda, Mr. A. E. Shipley; Insects, Mr. David Sharp, F. R.S.; Myriapoda, Mr. F. G. Sinclair; Arachnoida, Mr. C. Warburton; Crustacea, Professor W. F. R. Weldon; Coelenterata, Mr. S J. Hickson; and Sponges, Dr. W. J. Sollas. It is hoped that some of the volumes which are already far advanced may appear in the course of next year. The series will be fully illustrated. - The Biblia Publishing Company of Meriden, Conn., bas just issued its initial monthly number of "Ancient Egypt in the Light of Modern Discoveries," edited by Chas. H. S. Davis, Ph.D., and Rev. Camden M. Cobern, Ph.D., with an introduction by Rev. W. C. Winslow, LL.D. Over one hundred illustrations will appear in the twenty-four monthly parts; in the June issue are maps of Egypt as a whole, of Upper Egypt, of Lower Egypt, of the Basin of the Nile, of the Canal of Joseph, and of Egypt during the Horsford's Acid Phosphate, Recommended and prescribed by physicians of all schools FOR DYSPEPSIA, NERVOUSNESS, EXHAUSTION, pluvial period; this opening chapter treats of "Egypt and Its Original Inhabitants," and it is largely ethnographical in its cuts and letterpress. Mr. F. Turner contributes to the April number of the Agricultural Gazette of New South Wales a paper on the carob bean tree as one of the commercial plants suitable for cultivation in New South Wales. The Agricultural Department distributed a quantity of seed last year, and some healthy young plants raised from this seed are now growing in several parts of the colony. Mr. Turner expects that when the tree becomes better known to cultivators it will be extensively grown to provide food for stock, more especially during adverse seasons. The carob can not only be trained into a very ornamental shade tree, but may be planted as a wind-break to more tender vegetation. He advises all who cultivate it to keep bees, if only a single hive. It is astonishing, he says, how many flowers these industrious insects will visit in the course of a day, and be the agency whereby they are fertilized. LITERARY OUTFIT FREE. THE WEEKLY BULLETIN Anyo e sending us $1 00 at once and mentioning OF NEWSPAPER AND PERIODICAL inches, 223 pages, illustrated. This is a regular Catalogues and Classifies Each Week $200 book and a bargain at that price... The Library," a 10-age b ok containing a 1 year's subscription to the "Literary Light," a monthly magazine of Ancient, Medieval and Modern Literature.... $200 50 100 $4.00 $4.00 actual value for $1.00. Sample copy of "Lit EST Minneapolis, Minn. STERBROOK'S OF SUPERIOR AND STANDARD QUALITY. Ex-President Andrew D. White, of Cornell University, says: "I believe that the highest interests of Christian civilization and of humanity would be served by its adoption." "So set down, our tongue is the best for the world to unite upon."-Brooklyn Eagle. The idea of Mr. Bell has much to recommend it, and the presentation is charmingly clear."-American, Phila. "The result is a language which cannot fail to meet with acceptance."-Boston Traveller. "World English deserves the careful consideration of all serious scholars."-Modern Language Notes. Sent, postpaid, on receipt of price. N. D. C. HODGES, 874 Broadway, New York. FOSSIL RESINS. This book is the result of an attempt to collect the scattered notices of fossil resins, exclusive of those on amber. The work is of interest also on account of descriptions given of the insects found embedded in these longpreserved exudations from early vegetation. By CLARENCE LOWN and HENRY BOOTH 12°. $1. N. D. C. HODGES, 874 Broadway, N. Y. For INVENTORS. 40-page BOOK FREE. Address GEM OPALS. Cut ready for setting. Having pur chased a large lot at the Mexican locality, we are offering them at about one-fifth jewelers' prices; 50c., $1, $1.50, $2, $3. This is a rare opportunity to secure a fine gem very cheap. 100 pp. Mineral Catalogue 15c., in cloth 25c., Supplement 2c. GEO. L. ENGLISH & CO., Mineralogists, 733 and 735 Broadway, New York City. VOCAL PHYSIOLOGY. For use in Colleges and Normal Schools. Price 50 cents Sent free by post by N. D. C. HODGES, 874 Broadway, N. Y. QUERY. Can any reader of Science cite a case of lightning stroke in TO THE READERS OF SCIENCE. PUBLISHER'S ANNOUNCEMENT. which the dissipation of a small Titles of Some Articles Published in Science since | Baur, G., Clark University, Worcester, Mass. conductor (one-sixteenth of an inch in diameter, say,) has failed to protect between two horizontal planes passing through its upper and lower ends respective ly? Plenty of cases have been found which show that when the conductor is dissipated the building is not injured to the extent explained (for many of these see volumes of Philosophical Transactions at the time when light ning was attracting the attention of the Royal Society), but not an exception is yet known, although this query has been published far and wide among elec tricians. Jan. 1, 1892. Aboriginal North American Tea. Agriculture, Experimental, Status of Amenhotep, King, the tomb of. Beal, W. J., Agricultural College, Micu. Anatomy, The Teaching of, to Advanced Medical Brinton, D. G., Philadelphia, Pa. Students. Anthropology, Current Notes on. in Brooklyn. Arsenical Poisoning from Domestic Fabrics. Architectural Exhibition Artesian Wells in lowa. Astronomical Notes. Botanical aboratory, A. Brain, A Few Characteristics of the Avian. Canada, Royal Society of. Chalicotherium, The Ancestry of. Call, E. Ellsworth, Des Moines, Ia. Cragin, F. W., Colorado Springs, Col. Davis, W. M., Harvard College, Cambridge, Mass. Dimmock, George, Canobie Lake, N.H. Farrington, E. H., Agricultural Station, Champaign, Ferree, Barr, New York City. Flexner, Simon, Johns Hopkins University, Baltimore, Md. Foshay, P. Max, Rochester, N.Y. Chemical Laboratory of the Case School of Applied Gallaudet, E. M., Kendall Green, Washington, D.C. Science. Children, Growth of. Collection of Objects Used in Worship. Cornell, The Change at. Deaf, Higher Education of the. Diphtheria, Tox-Albumin. Eskimo Throwing Sticks. Electrical Engineer, The Technical Education of. Eye-Habits. Facial Expressions. Fossils, Notice of New Gigantic. Four-fold Space, Possibility of a Realization of. Glacial Phenomena in Northeastern New York. Grasses, Homoptera Injurious to. Great Lakes, Origin of the Basins of. "Healing, Divine." Hemipter, us Mouth, Structure of the. Hofmann, August Wilhelm von. Indian occupation of New York. Garman, S., Museum of Comp. Zool., Cambridge, Mass. Golden, Katherine E., Agricultural College, Lafay ette, Ind. Hale, Edwin M., Chicago, Ill. Hale, George S., Boston, Mass. Hale, Horatio, Clinton, Ontario, Canada. Hall, . Proctor, Clark University, Worcester, Mass. Hay, O. P., Irvington. Ind. Haynes, Henry W., Boston Mass. Hazen, H. A., Weather Bureau, Washington, D.C. Hewitt, J. N. B., Bureau of Ethnology, Washington, D.C. Hicks, L. E., Lincoln, Neb. Hill, E. J., Chicago, Ill. Johnson, Roger B, Miami University, Oxford, O. Kellogg, D. S., Plattsburgh, N. Y. Lintner, J. A., Albany, N. Y. Loeb, Morris, New York City. Mabery, Charles F., Cleveland, Ohio. McCarthy, Gerald, Agricultural Station, Raleigh, MacDonald, Artbur, Washington, D.C. D.C. THE LABRADOR COAST. Lou's Curves, Simple Apparatus for the Produc- Mill-paugh. Charles F., Morgantown, W. Va relating to the civil and natural history of Physa Heterostropha Lay, Notes on the Fertility of. Preble, Jr., W. R., New York City. Schufeldt, R. W., Washington, D.C. Scripture, E. W., Clark University. Worcester, Mass. Slade, D. D., Museum Comp. Zool., Cambridge, Mass. Smith, John B., Rutgers College, New Brunswick, N.J. Southwick, Edmund B., New York City. Stevens, George T., New York City. Stone, G. H., Colorado Springs, Col. Thomas, Cyrus, Washington, D. C. Thurston, R. H., Cornell University, Ithaca, N.Y. True, Frederick W., National Museum, Washington, D.C. Turner, C. H., University of Cincinnati, Cincinnati, 0. Wake, C., Staniland, Chicago, Ill. Zoology in the Public Schools of Washington, D. C. Ward, F. DeC., Harvard University, Cambridge, Some of the Contributors to Science Since Jan. Aaron, Eugene M., Philadelphia, Pa. Mass. Ward, Stanley M., Scranton, Pa. Warder, Robert B., Howard University, Washington, D.C. Welch, Wm. H., Johns Hopkins University, Baltimore. M.D. West, Gerald M., Clark University, Worcester, Mass. Whitman, C. O., Clark University, Worcester, Mass. Williams, Edward H., Lehigh University, Bethlehem, Pa. A WEEKLY NEWSPAPER OF ALL THE PUBLISHED BY N. D. C. HODGES, 874 BROADWAY, NEW YORK. D SCIENCES. Entered at the Post-Office of New York, N.Y., as 44 47 48 JULY 22, 1892. SINGLE COPIES, TEN CENTS. $3.50 PER YEAR, IN ADVANCE. The Scientific American FOR 1892. The Most Popular Scientific Paper in the World. WEEKLY, $3.00 A YEAR; $1.50 SIX MONTHS. THIS unrivaled periodical, which is now in its forty-seventh year, continues to 46 maintain its high reputation for excellence, and enjoys the largest circulation ever attained by any scientific publication. 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