INDEX NAMES OF CONTRIBUTORS ARE PRINTED IN SMALL CAPITALS Albatrosses, Our Great Rovers of the High Seas, R. W. SHUFELDT, 469 Astronomy in Canada, OTTO KLOTZ, Atom, Modern Study of, ALAN W. C. MENZIES, 364; of Light, 377; Re- SHUFELDT, R. W., Albatrosses, Our Great Rovers of the High Seas, 469 Solar Eclipse of September 21, 383 Tar-Baby Story at Home, W. NOR- Thinking, Conceptual, WALTER LIBBY, THOMPSON, WILLIAM F., Marine Maps of United 557 Better service in the supplying of Living and Preserved Material and Microscopic Slides. If you mark your order "RUSH," shipment will be made on the day following receipt of order. Our location enables us to specialize, both as to price and quality, on frogs, crayfish, elams, grasshoppers, pig embryos, etc. Injected Cats, Turtles, Frogs and Cryptos of really first class quality. Insect Life Histories. Osteological Preparations. Microscopes. Lantern Slides for Human Anatomy. WRITE FOR CATALOG PRICE LIST NO. 29 THE ANGLERS COMPANY 1534 West Lake Street, Chicago, Illinois Georgetown University SCHOOL OF MEDICINE AND DENTAL DEPARTMENT The Sixty-fourth Session began in September and con. tinues eight and one-half months. Six-Year Collegiate and Medi. cal Course leading to degrees B.S. and M.D. Practical laboratory work under special instructors, in Anatomy, Physiology, Chem. istry, Histology, Pathology and Bacteriology. Ample facilities for clinical experience and practical work in hospitals of alty and in the University Hospital, containing in all over 3,000 beds. For particulars address GEORGE M. KOBER, M. D. Photographs, maps, drawings, colored prints and specimens, in fact any opaque subject that will fit in the large object holder can be projected by the Combined Balopticon which also takes the regulation slides. With its powerful Mazda lamp, sturdy construction and ease of operation, the Bausch & Lomb Balopticon is the ideal projection lantern for schools. Write for descriptive literature and prices. BAUSCH & LOMB OPTICAL CO. 550 St. Paul Street, that eyes may see STUDENTS' MICROSCOPES The "Praxis" Stand is the Student's model par excellence. Made throughout with the same ac curacy and finish as on Watson's highest priced Stands. A few special points are:- Standardiza tion so that additional movements may be fitted as required. Lever fine adjustment. Constructed of two solid castings and indestructible. All parts are slotted and sprung to compen sate for wear. Catalogue of Microscopes and accessories for W. WATSON & SONS, Ltd. 313, High Holborn, London, England Naturalists' Supplies We carry stock for prompt delivery 1. Collecting Utensils. II. Breeding Apparatus and Cages for Living Animals. IV. V. VI. VII. VIII. IX. X. XI. XII. Cabinets, Insect Cases and Lining Material. Explorers' and Collectors' Camp Outfits. New Illustrated Biological Catalog will be sent free of charge upon application |