THE JOURNAL OF IMMUNOLOGY MEDICINE AN HISTORICAL OUTLINE Aesculapius Benjamin Rush Claudius Galen Paul Ehrlich Avicenna By Walter Reed Guy de Chauliac Horace Wells Jacques Sylvius M, G. SEELIG, M.D. William T. G. Morton Andreas Vesalius Washington University Louis Pasteur Gabrielc Fallopio Lord Lister Michael Servetus Robert Koch A kaleidoscopic picture Rene Laennec Ambroise Pare of the rise and develop- Richard Bright WiIliam Harvey ment of medicine, pre- Semmelweis van Lecuwenhoek sented with an eye to the Oliver Wendell Holmes Dominique-JeanLarrey Thomas Willis dramatic. Guillaume Dupuytren Thomas Sydenham Sir Astley P. Cooper Hermann Boerhaave Ephraim McDowell Leopold Auenbrugger Albrecht von Huller Features a collection James Marion Sims Francois Xavier Bichat o] 49 portraits on Johannes Mueller Giovanni Morgagni William Beaumont John Hunter ]ull page plates. Hermann v. Helmholtz Edward Jenner Philippe Pinel 224 pages, $1.50 Theodor Billroth Antomo Scarpa Sir William Osler

THE WILLIAMS & WILKINS COMPANY ° BALTIMORE, MARYLAND

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THE EMPLOYMENT BUREAU Another Humphreys Weather Book OF THE Society of American Bacteriologists You enjoyed FOGS AND CLOUDS, • For the benefit both of employers seeking to fill WEATHER PROVERBS AND PAR- vacancies, and of applicants desiring a position ADOXES, RAIN-MAKING. in the field of bacteriology, the Society of Ameri- can Bacteriologists maintains an Employment The new one is Bureau. There is no charge for registering with the Bureau, but applicants for positions agree to send the bureau a small per cent of their salary for the first three months, viz., 3% if the applicant WEATHER is a member of the Society, and 5% if a non-mem- ber. Funds received in this manner are used to defray actual operating expenses of the bureau on a non-profit basis, and any excess sums are transferred to the Society for the support and RAMBLES enlargement of its publications, research fellow- ship, culture collection, and other activities. By WM. J. HUMPHREYS • Positions filled through the bureau include Long~irae Maeoroloslcal Physicist, those of U. S. tVcather Bureau Research Bacteriologist Agriealturai Bacteriologist Twenty weather "adventures" about--for Teaching Bacteriologist Industrial Microbiologist instance--the prairie twister; what the trees Medical Bacteriologist Laboratory Technician Serologist Hospital Technician murmur about; the stuff called air; the struc- ture of the atmosphere; where rain comes • Under present conditions, causing frequent from; counting and weighing the air; what changes, the Bureau is exerting added effort to fill would happen if Greenland'sice should melt-- vacancies. All inquiries are given prompt and as it is melting. careful attention. Address communications to: Cloth. 5½ x8. 265 pp, 37 illustrations. $2.50 Dr. Frank H. Johnson, Director Employmen~ Bureau of the THE WILLIAMS & WILKINS COMPANY Society of American Bacteriologists Publiduw: of Scienlif~ Books and Poriodieals PRINCETON, HEW JERSEY Baltimore, Md., U. S. A.

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A.H.T. CO. SPECIFICATION ELECTRIC ROTATING APPARATUS For use in the Kline, Boerner-Jones-Lukens, Mazzini and other flocculation tests for shaking micro test slides, antigen flasks, etc.

3623-K.

Strap for holdingflasks, bottles, etc., in positionon platformof 3623 Rotator

3623.

ELECTRIC ROTATING APPARATUS, A.H,T. Co. Specification. Designed particularly for use in the Kline, Boerner-Jones-Lukens, Mazzini and other floceulation tests to eliminate the necessity for hand shaking of micro test slides, antigen flasks, etc., particularly in laboratories making a large number of tests. Generally similar in appearance to the Boerner Shaking Apparatus, i.e. with rubber covered floating platform 13 inches square attached to four vertical springs fastened to the corners of a metal base, enclosed in a metal guard, and with an automatic cut-off timing device, but with speed control rheostat and motor with worm reduction gear and driving mechanism which rotates the platform in a horizontal plane so that it circles an area g-inch diameter to simulate hand rotation as suggested in the original Kline technique described in B. S. Kline, "Microscopic Slide

Slide Flocculation Test for Syphilis," American Journal of Clinical , Vol. 9, No. 2 (March, 1939), p. 163. Range of speed, 30 to 280 r.p.m. Automatic timing device can be set for a maximum interval of 28 minutes in steps of ½minute. Slides can be rotated safely by simply placing them on the surface of the rubber covered platform which is supplied with four retaining bands of rubber around the edges. Flasks, Bottles, etc., 50 ml to 2000 ml capacity, are held firmly in position by means of 3623-K Straps of coiled spring wire. Operation at a speed of approximately 200 r.p.m, for a period of four minutes best meets the requirements of both the Kline and Boerner-Jones-Lukens tests, and at 120 rotations per minute for four minutes meets the requirements of the Mazzini test. The motion duplicates almost exactly the excursion and vigor of hand shaking. Useful also for rotating small flasks for gentle agitation, e.g. when water purifying Kline antigen, etc. 3623. ElectricRotating Apparatus, A.H.T. Co. Spedfleation,as above described, with automatic cut-offtim- Code ing device, speed control rheostat with graduated dial with arbitrary scale from 0 to 100, cord and Word plug. For useon II0 volts, a.e. or d.c ...... 50.00 Dofck 3623.B, Ditto, but for use on 220 volts, a.c or d.c ...... 51.00 Dofeg 3623.K. Strap, of cx)iled spring wire with metal hook at each end. For holding Flasks, Bottles, etc., 50 ml to 2000 ml incl. in position on platform of 3623 Rotator as shown in illustration ...... 1.65 Dofgr

ARTHUR H. THOMAS COMPANY RETAI L--WHOLESALE--EXPORT LABORATORY APPARATUS AND REAGENTS WEST WASHINGTON SQUARE PHILADELPHIA, U. S. A. CABLE ADDRESS, "BALANCE" PHILADELPHIA

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