WESTERN RESERVE UNIVERSITY SCHOOL OF MEDICINE ONLY MEDICAL SCHOOL IN THE CITY OF CLEVELAND Admits only college students and seniors in absentia. ¶Excellent laboratories and facilities for research and advanced work. Large clinical material. Sole medical control of Lakeside, City, Charity and Maternity Hospitals and Babies' Dispensary. Clinical Clerk Services with individual instruction. Wide choice of hospital appointments for all graduates. Marine Biological Laboratory Woods Hole, Mass. INVESTIGATION Entire Year INSTRUCTION July 2 to August 12, 1919 SUPPLY DEPARTMENT ¶ Fifth optional year leading to A.M. in Medicine. Open the Entire Year Session opens Oct. 2, 1919; closes June 17, 1920 For catalogue, information and application blanks, address Facilities for rescach in Zoology. Embryology, Physiology and Botany. Seventy-six private laboratories, $100 each for not over three months. Thirty tables are available for beginners in research who desire to work under the direction of members of the staff. The fee for such a table is $50.00. Courses of laboratory instruction with lectures are offered in Invertebrate Zoology, Protozoology Embryology Physiology and Morphology and Taxonomy of the Algae. Each course requires the full time of the student. Fee, $50. A lecture course on the Philosophical Aspects of Biology and Allied Sciences is also offered. Animals and plants, preserved, living, and in embryonic stages. Preserved material of all types of animals and of Algae, Fungi, Liverworts and Mosses furnished for classwork, or for the museum. Living material furnished in season as ordered. Microscopic slidesin Zoology, Botany, Histology, Bacteriology. Price lists of Zoological and Botanical material and Mic.oscopic Slides sent on application. State which is desired. For price lists and alli nformation regarding material, address GEO. M. GRAY, Curator, Woods Hole, Mass. The annual announcement will be sent on application to The THE REGISTRAR, 1353 East 9th St., Cleveland Director, Marine Biological Laboratory, Woods Hole, Mass. WOMAN'S MEDICAL COLLEGE OF PENNSYLVANIA 69th year begins September, 1918. Entrance requirements: two years of college work, including Chemis try, Physics, Biology, and two languages other than English (one of which must be French or German). Excellent laboratories. Full-time teachers. Clinical advantages: dispensaries, clinics, bedside instruction, out-patient obstetrical service. New and well equipped hospital. Post-graduate instruction. For announcement and further information address MARTHA TRACY, M.D., Dean 2101 N. College Ave. Philadelphia, Pa. Prof. F. A. Saunder's Wave Projection Slide The Microscope 12th Edition, Published April 10, 1917 COMSTOCK PUBLISHING CO., Ithaca, N. Y. Data and Reference Tables. 278 Pages. 89 Tables. Compiled and Edited by HENRY H. DONALDSON. Postpaid, $3.00. The Wistar Institute Wm. Gaertner & Co. Standard Apparatus of Precision Measuring In Philadelphia, Pa. struments of great variety mometers. Catalogue No. Reading Device for Ther C1365, $2.00 An Inexpensive, High Quality ANALYTICAL BALANCE FOR THE STUDENT Balance, Analytical, Student's Model. Beam 6 inches, is of aluminum, graduated in 50 divisions each side c center, which are numbered for a 5 mgr. rider, beam finished in black with the graduations and figures in white; equipped with Double Rider Arrangement. Pillar is brass, highly polished and lacquered. Capacity 200 grams sensitive to 1-10th mgr. Dial has red graduations on a white background so that the black pointer is easily observed. All knife edges and bearings are of Agate. Case is genuine Mahogany, French polished, is 16 inches long, 17 inches high, 9 inches deep, provided with counterpoised door in front with glass on all sides and top. A high grade balance for the student and also very useful in the Industrial Laboratory. IN STOCK FOR IMMEDIATE DELIVERY $65.00 Scientific Materials Co. "EVERYTHING FOR SCHOOL AND COLLEGE LABORATORIES" "C. S. & E." Anhydric Electric Incubators and Paraffine Ovens Heating plates combined with precision thermostats offer a constant temperature within closer range than most of the appliances of other incubators. 3. The manipulation is extremely easy and it is practically impossible for any parts to become out of order. 4. Special construction of the incubating chamber protects the wood against warping. 5. The cabinets are made from well seasoned oak, neatly finished and polished, and represent an attractive piece of furniture. 6. The construction is approved by Underwriter laboratories. 7. The walls of the incubating chamber are made of five-ply wood with animal hair, tar paper and transite isolation, thus rendering the chamber non-conductive of heat and at the same time making the wood impervious to moisture. The "C. S. & E." 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