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THE HISTORY OF SCIENCE The conference upon the History of Science, initiated by the American Historical Association at its annual meeting a year ago in Cleveland, proved such a success that the program committee devoted another session to the subject this December at Washington. Simultaneously the History of Science Section, which has recently been formed under the auspices of the American Association for the Advancement of Science, was meeting in Chicago, thus demonstrating the widespread interest in this promising field. This widespread interest was further evidenced at Washington by the variety of learned occupations represented by the speakers who included, in addition to professors of science and history, a librarian, a college president, and the head of an institution for research. · Robert S. Woodward, president of the Carnegie Institution of Washington, presided as almost his last official act before retiring from his long tenure of that office. In his introductory remarks he welcomed the attitude of the American Historical Association towards the history of science, emphasized the need of breaking down the artificial barriers which divide learning into different departments, and recalled a scheme dating back to 1907 but never executed for a general history of the inductive sciences by a number of collaborators under the direction of the Carnegie Institution.

In a paper on “Recent Realignments in the History of Medieval Medicine and Science," Dr. Fielding H Garrison, librarian, Surgeon General's Office, warned against past exaggeration of medieval ecclesiastical hostility towards science, and against deriding the science of that period. In British libraries alone Mrs. Singer has found 30,000 scientific manuscripts from the medieval period, of which some 15,000 are medical. Dr. Garrison went on to compare the general character of medieval science and medicine with that of other periods including our own, and to appraise its relations to them. The rapid progress of scientific dis

covery in more recent times was convincingly illustrated by a paper on “Developments in Electro-Magnetism during the Past Hundred Years,” by Professor Arthur E. Kennelly, of Harvard University, who traced the achievements of Ampère, Farraday, and others, and showed the far-reaching influence and enormous importance of developments in electromagnetics in well-nigh every other field whether of scientific theory or of applied science and practical invention; as, for example, the effect of the theory of electrons upon chemistry and the earlier atomic theory.

Professor James Harvey Robinson, of the New School for Social Research, discussed with characteristic satirical wit and literary force to the delight of the large audience “Free Thought, Yesterday and To-day,” from the standpoint of the student of intellectual history, comparing more especially the ways of thinking of the Deists and other eighteenth century philosophers with our own, and bringing out how the rules and methods of "the intellectual game” had profited by the scientific advance of the last century.

Because of the lateness of the hour Lyon G. Tyler, president emeritus of the College of William and Mary, did not read his paper upon“ Science in Virginia.” It is to be hoped that not only it but also the other papers which were read may be speedily published and rendered available for a larger audience.



A Weekly Journal devoted to the Advancement of Science, publishing the official notices and proceedings of the American Association for

the Advancement of Science

Published every Friday by

Entered in the post-office at Lancaster, Pa., as second clan matter

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Johns Hopkins University Tulane University of


Medical School
The Medical School is an Integral Part of the University and
is in clovo Afiliation with the Johns Hopkins Hospital

Candidates for admission must be graduates of approved

SCHOOL OF MEDICINE colleges or scientific schools with at least two year's instruction, including laboratory work, in Chemistry, and one year each in

(Established in 1834) physics and biology, together with evidence of a reading knowledge of French and German,

ADMISSION: All students entering the Freshman Each class is limited to 90 students, men and women being Class will be required to present credits for two admitted on the same terms. Except in unusual circumstances, applications for admission will not be considered after July 18

years of college work, which must include If vacancies occur, students from other institutions desiring Chemistry General and Organic), Physics and advanced standing may be admitted to the second or third year Biology, with their laboratories, and at least provided they fulfill all of our requirements and present exceptional qualifications.

one year in English and one year in a modern

foreign language. INSTRUCTION The academic year begins the Tuesday nearest October 1 and

COMBINED COURSES: Premedical course of two closes the third Tuesday in June. The course of instructon,

years is offered in the College of Arts and occupies four years and especial emphaşis is laid upon prac. Sciences, which provides for systematic work tical work in the laboratories, in the wards of the Hospital and in the Dispensary.

leading to the B.S. degree at the end of the TUITION

second year in the medical course. The charge for tuition is $250 per annum, payable in threo instalments There are no extra fees except for rental of microscope, certain expensive supplies, and laboratory breakage.

School of Pharmacy, School of Dentistry and The annual announcement and application blanks may be Graduate School of Medicine also. obtained by addressing the Dean of the Johns Hopkins Medica School

Women admitted to all Schools of the Washington and Monument Sts. BALTIMORE, M.D

College of Medicine

For bulletins apd all other information, address Beginning Tuesday, June 6th, and ending Thursday, July 16th, a course in medical diagnosis, including laboratory exer- Tulane College of Medicine cises in clinical pathology and demonstrations in pathological anatomy, will be offered. The course will be limited to twenty

P. O. Box 770 students, fee $100. Applications should be made to the Dean's

New Orleans, L2. Office.

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NOW READY The Physics of the Air By WILLIAM J. HUMPHREYS, Ph.D. Professor of Meteorological Physics, United States

Weather Bureau A rational and deductive treatise on the physics of the atmosphere. Of great value to meteorologists, physicists and the aviator. 678 Pages, Illustrated, Index, 8vo. Price, $5

Address orders and inquiries to THE FRANKLIN INSTITUTE


The Third Year i stomatio and alinical and is dovoted to Course

the study of tho natural history of diseaso, to diagnosis and to therapoution. In this year the systematic courses in Modioino, Burgory and Obstetrics are completod.

The Fourth Year Course

is clinical. Students spend the entire foroRoon throughout the year as clinical clorks in hospitals uador careful suporvision. The clinical clerk takes the history, makes the physical examination and tho laboratory examinations, arrives at a diagnosis wbich be must defend, outlines the treatment under bis instructor and observes and records the result. In case of operation or of autopay he follows the specimen and identifies its pathological nature. Two general hospitals, one of which is owned and oontrolled by the University, one special hospital and the municipal hospitals and laboratories are open to our students. The aftornoong are spent in the College Dispensary and in clinical work in medical and surgioal specialties and in conferences.

MERCURY C. P. and redistilled in any


Summer School- & summer course in pathology covering a period of six weeks during June and July will be given in base there is a sufficient number of applicants.

Address the Secretary of the College, 307 Orange Street

Syracuse, N. Y.

THE CHEMICAL PRODUCTS CO. 2715 St. Clair Ave., N. E.


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Eastman Organic Chemicals

DURING the past month the following chemicals have

become available:

P603 * Chloranil (Practical)
930 * 2-Chloro-5-hydroxytoluene
935 * 2-Chlorotoluene-5-sulfonic Acid
P932 Citral

933 * Lauric Acid
934 * Sodium Malonate
931 * Tri-n-butyl Carbinol

Of the above list all those distinguished by an asterisk have been prepared or purified in our laboratory.




for use with Siemens & Halske

Millivoltmeters In pre-war days we imported and sold a large number of Direct-current Precision Portable Millivoltmeters (10 ohm type); and for use with them, there was a series of excellent Shunts, ranging in capacity from 0.15 to 3000 amperes.

We have some of the Shunts in stock today, and believe that customers who purchased the Millivoltmeters will be glad of an opportunity to select fronı the following list : Catalog


16007 Combination shunt for direct attachment; 0.15, 0.30 and 0.75 amp. $ 9.20
16009 Ditto, 15 and 30 am.
16010 Single rangelshunt for direct attachment; 75 amp. X.

Ditto, 150 amp.
16012 Single range shunt for use with leads; 300;amp.
16013 Ditto, 750 amp.

16014 Ditto, 1500 amp.
Ditto, 3000 amp.

16016 Pair of leads, 1 meter long; for use with shunts 16012-16015 ta,

11.20 16017 Ditto, 2{meters long These Shunts and leads can be used with any '10 ohm Siemens & Halske Millivoltmeter, but not with other types.

The prices quoted apply only to goods now on hand—and as the supply is limited, we suggest prompt action by those who are interested.




James G. Biddle

1211-13 Arch Stroot, Philadelphia

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Write for Catalogue No. 21


THE ANGLERS CO. Quality First



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For use with potentiometers, electrometers, and ballistic galveno meters, or wherever else a precision standard of electromotive force to needed.

Negligible Temperature Coefficient.

Highly Constant E. M. F.
Contents hermetically sealed in glass so that lowering of electro-
motive force due to evaporation is impossible.

Mounted in moulded box, or unmounted.
My comparison certificate accompanies each cell without charge.
Bureau of Standards certificate extra.

On November 13. 1916, three normal cadmium cells made by me were certified by the

Bureau of Standards as differing from their group of reference cells by less than one part in one hundred thousand, all three having the same value.

On March 30 1920, after the lapse of three years and four months, the same three cells were again compared by the Bureau of Standards. The maximum difference among the three was less than one part per hundred thousand, and the maximum

difference from their certified value of 1916, was less than one part per hundred thousand.

In other words, these cells showed a degree of constancy to all intents equal to that considered most highly satisfactory, if not remark. able, in the very best type of precision resistance standards. (see Bul. Bur. of Stand. Vol. 5, No. 3. p. 427.)

The cells in question were in nowise special. They were made of the materials regularly prepared by me, and were set up with no greater care than that constantly employed in the making of my standards.


Marion Eppley,

(A.M., Ph.D.)
Physico-Chemical Apparatus.


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