HENDRIK ANTOON LORENTZ, of Amsterdam, Holland, “in recognition of his researches which have so largly contributed to laying on a new foundation our knowledge of the nature of light and in developing our ideas concerning the ultimate constitution of matter."

David WATSON TAYLOR, of Washington, D. C., “in recognition of his fundamental contributions to the theory of ship resistance and screw propulsion, and of his signal success in the application of correct theory to the practical design of varied types of war vessels in the United States Navy."

THE ELLIOTT CRESSON MEDAL.

EDWIN FITCH NORTHRUP, of Princeton, N. J., for his Electric Furnace and High Temperature Investigations.

THE HOWARD N. Potts medAL.

PROF. ULRIC DAHLGREN, of Princeton, N. J., for his paper, entitled "The Production of Light by Animals," in the Journal.

THE EDWARD LONGSTRETH MEDAL.

F. H. ACHARD, of Cambridge, Mass., for the paper, prepared in conjunction with Prof. A. E. Kennelly and Mr. A. S. Dana, entitled “Experimental Researches on the Skin Effect in Steel Rails," in the JOURNAL.

JOHN D. BALL, of Milwaukee, Wis., for his paper, entitled “Investigations of Magnetic Laws for Steel and Other Materials," in the JOURNAL CHRISTOPHER A. BECKER, of New York City, N. Y., for the Chainomatic

Balance.

A. S. DANA, of Cambridge, Mass., for the paper, prepared in conjunction with Prof. A. E. Kennelly and Mr. F. H. Achard, entitled "Experimental Researches on the Skin Effect in Steel Rails," in the JOURNAL.

THE HOOVEN, OWENS, RENTSCHLER COMPANY, of Hamilton, Ohio, for the development of ingenious methods used in the manufacture of the Hooven Automatic Typewriter.

PROF. A. E. KENNELLY, of Cambridge, Mass., for the paper, prepared in conjunction with Messrs. F. H. Achard and A. S. Dana, entitled "Experimental Researches on the Skin Effect in Steel Rails," in the JOURNAL

PROF. DAYTON C. MILLER, of Cleveland, Ohio, for his papers, entitled "A 32-Element Harmonic Synthesizer" and "The Henrici Harmonic Analyzer and Devices for Extending and Facilitating its Use," in the JOURNAL.

GEORGE A. RANKIN, of Creighton, Pa., for his paper, entitled "Portland Cement," in the JOURNAL.

ALBERT RINGLAND, of Philadelphia, Pa., for his inventions embodied in the Portable Brinell Meter.

FRANK H. SCHOENFUSS, of Philadelphia, Pa., for his inventions embodied in the Portable Brinell Meter.

THE SHARPLES SPECIALTY COMPANY, of West Chester, Pa., for the Sharples Super-Centrifuge.

THE JOHN SCOTT LEGACY MEDAL AND PREMIUM

AWARDED BY THE CITY OF PHILADELPHIA ON THE RECOMMENDATION OF
THE FRANKLIN INSTITUTE.

THOMAS A. MCCALL, of South Akron, Ohio, for his inventions embodied in the Hooven Automatic Typewriter.

JOHN H. PILLINGS, of Hamilton, Ohio, for his inventions embodied in the Hooven Automatic Typewriter.

MAX ULRICH SCHOOP, of Zurich, Switzerland, for the Schoop Metal Spraying Process.

ALFRED RISH WORTH TATTERSALL, of London, England, for the "Midget" Marvel Flour Mill.

ELLIOTT CRESSON MEDAL RECOMMENDATION.

(Awards pending.)

DR. BYRON E. ELDRED, of New York City, N. Y., for his Low-Expansion Leading-In Wire for Incandescent Electric Lamps.

COL. ISAAC NEWTON LEWIS, of Montclair, N. J., for his Machine Gun.

HOWARD N. POTTS MEDAL RECOMMENDATION.

(Award pending.)

LOUIS VESSOT KING, of Montreal, Canada, for his Linear Hot-Wire Anemometer.

EDWARD LONGSTRETH MEDAL RECOMMENDATION.

(Award pending.)

INTERNATIONAL MONEY MACHINE COMPANY, of Terre Haute, Ind., for the development of the International Money Machine.

JOHN SCOTT RECOMMENDATIONS.

(Awards pending.)

THOMAS BILYEU, of Hillsboro, Ore., for his inventions embodied in the International Money Machine.

LUCIEN I. YEOMANS, of Chicago, Ill., for his Method of Lathe Construction.

TERMS AND PRIVILEGES OF MEMBERSHIP

The members of the Institute are divided into the following classes, viz.: Resident Members, Stockholders, Life Members, Permanent Members, Non-resident and Associate Members.

Any one interested in the purposes and objects of the Institute and expressing a willingness to further the same may become a member when proposed by a member in good standing and elected by the Board of Managers.

Terms.-Resident members pay Fifteen Dollars each year. The payment of Two Hundred Dollars in any one year secures Life Membership, with exemption from annual dues.

Stock.-Second-class stockholders pay an annual tax of Twelve Dollars per share, and the holder of one share is entitled by such payment to the privileges of membership.

Privileges. Each contributing member (including non-residents) and adult holder of second-class stock is entitled to participate in the meetings of the Institute, to use the Library and Reading Room, to vote at the Annual Election for officers, to receive tickets to the lectures for himself and friend, to attend the Section meetings and to receive one copy of the JOURNAL free of charge, except associate members, who may not take part in elections.

Permanent Members.-The Board of Managers may grant to any one who shall in any one year contribute to the Institute the sum of One Thousand Dollars a permanent membership, transferable by will or otherwise.

Non-resident Members.-Newly elected members residing permanently at a distance of twenty-five miles or more from Philadelphia may be enrolled as Non-resident Members, and are required to pay an entrance fee of Five Dollars, and Five Dollars annually. Non-resident Life Membership, $75.00.

Contributing members, if eligible, under the non-resident clause, on making request therefor, may be transferred to the non-resident class by vote of the Board of Managers, and are required to pay Five Dollars annually.

Associate Members.-Associate members are accorded all the privileges of the Institute, except the right to vote or hold office, upon the payment of annual dues of Five Dollars. This class of membership is limited to persons between the ages of seventeen and twenty-five years. Upon reaching the age limit they become eligible to the other classes of membership.

Resignations must be made in writing, and dues must be paid to the date of resignation.

MEETINGS AND LECTURES

1917-1918

October 4, 1917-" The American Air Service."

BY W. F. DURand, Ph.D.,

Chairman, National Advisory Committee for Aeronautics,
National Research Council, Washington, D. C.

The lecture will review briefly the various steps taken in the development of the great air fleet intended for military use in France, with some mention of the equipment of the different types of machines, their chief characteristics and requirements for effective service. The development of the U. S. A. aeronautic engine will also be described, with some intimation of the steps to be taken for its production in large quantity. The special needs of the naval aeronautic service will be discussed in the same general manner, and some general statements made as to the methods in hand for meeting the same.

Taking up the subject of personnel, the lecture will then discuss the steps needful in the training of military aviators through the various stages, and describe the manner in which such training is now being carried out at the various training camps in the United States, to be followed by special and final advanced training in France.

The instrumental and military equipment of a modern airplane will be described briefly, including reference to instruments required for navigation, machine guns, bombs, and bomb-dropping devices.

The purpose of the lecture is informing regarding the constitution and development of the great air fleet which the United States has promised to the cause of the Allies.

Illustrated by lantern slides.

October 11, 1917-" Propulsion of Ships."

BY ESKIL BERG,

General Electric Company, Schenectady, N. Y.

A brief review will be made of methods now in use to propel vessels. The steam turbine and its application to marine propulsion will particularly be discussed.

More recent geared turbine and electric drive installation will be shown, together with results as to economy obtained.

Full description will be given of the electric propelling machinery of

some of the most recent warships.

Lantern slides will be used to illustrate the lecture.

Joint meeting with the Philadelphia Section, American Institute of Electrical Engineers.

October 17, 1917-" Occluded Gases in Ferrous Alloys."

BY GELLERT ALLEMAN, PH.D.,

Professor of Chemistry, Swarthmore College, Swarthmore, Pa.

1. An outline of previous researches on occluded gases, and a description of some of the apparatus used.

2. Details of the new apparatus employed by the lecturer.

3. Changes in physical and chemical properties of ferrous alloys, due to the presence or absence of occluded gases.

4. The lecture will be illustrated by exhibiting the high-temperature and vacuum apparatus employed and by means of lantern slides.

October 25, 1917-" The Palate of Civilized Man and Its Influence on Agriculture."

BY DAVID FAIRCHILD, SC.D.,

Agricultural Explorer in Charge of the Office of Foreign Seed and Plant Introduction of the United States Department of Agriculture,

Washington, D. C.

It is not generally recognized that the crops we are now growing are those dictated by the fashion in foods rather than as the result of careful experimentation on the part of civilized man. The present war, which it was predicted would be a food war, has brought out in a striking way the fact that one of the great stumbling-blocks in the way of a quick increase in our food supply lies in the conservatism of taste of civilized races-accustomed to certain kinds of foods and refusing others equally good because they are strange to them.

The almost total neglect, and the difficulties encountered on the part of the educational system of all civilized countries, to recognize the importance of broadening the food habits of its children, tends to maintain fixed food habits and restrict their agriculture to a limited number of crops.

For twenty years the Office of Foreign Seed and Plant Introduc tion of the Department of Agriculture has been studying the crops of the world and experimenting with such as are suited to our climatic conditions and could be grown here, and the lecturer will give exam ples, with illustrations, of certain of these crops, and a brief account of the experiences of these twenty years of attempts to broaden our food

menu.

November 1, 1917-" Atmospheric Electricity."

By W. F. G. Swann, A.R.C.S., D.Sc.,

Chief of the Physical Division, Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, D. C.

The lecture will review the present state of our knowledge of the normal electrical field of the atmosphere and of the causes responsible for atmos pheric ionization. The part played by radio-active materials in the soil and air will be discussed in the light of a comparison of atmospheric-electric