The subject matter is strictly confined to original zoological research--systematic and anatomical. Fully illustrated by lithographic plates and text figures. Each volume will consist of 4 parts, price $5. _All subscriptions should be forwarded to_ Messrs. Dulau & Co., Ltd. 37 Soho Square, London, W., England --------------------------- GRIFFITH Incubators [Illustration] A simple, well constructed bacteriological incubator --------------------------- The Journal of Parasitology A Quarterly devoted to Medical Zoology This journal will be a medium for the prompt publication of briefer papers and research notes on animal parasites. Emphasis laid on the morphology, life history and biology of zooparasites and the relations of animals to disease. Subscription, $2.00 a volume Managing Editor, HENRY B. WARD, Univ. Illinois, Urbana, Ill. =================================================================== =GAGE--The Microscope= An Introduction to Microscopic Methods and to Histology By SIMON H. GAGE. Twelfth edition in press. Entirely rewritten, and with many new illustrations. Price $2.00. This work aims to give help to everyone who uses the microscope, whether he is a beginner or an advanced worker. =COMSTOCK--A Manual for the Study of Insects= By JOHN HENRY COMSTOCK, Professor of Entomology in Cornell University, and ANNA BOTSFORD COMSTOCK, member of the Society of American Wood-Engravers. 8vo. cloth, IX. + 701 pages, 797 figures in the text, and six full page plates. Nearly all of the figures were engraved especially for this work. Postpaid $4.07; net $3.75. This handbook is designed to meet the needs of teachers in the public schools and of students in high schools and colleges. =NEEDHAM--General Biology= A book of outlines and practical studies for the general student By JAMES G. NEEDHAM, Professor of Limnology and General Biology in Cornell University. Cloth 8vo. XIV. + 542 pages; 288 figures, mostly original. Postpaid $2.00. This book is expressly designed to help the general student obtain a comprehensive grasp of the principles of biology. =COMSTOCK--Handbook of Nature-Study=