Vol. XI, No. IT. NOVEMBER, 1890. 



No. 131. 



The American 



M 



MONTHLY 



CONTAINING 



CONTRIBUTIONS TO BIOLOGY. 



CONTENTS 



Microscopy for Amateurs. — White - 245 Invisible Assailants of Health. 



Protective Inoculations. — Bolton - 254 Habitat of the Tetanus Germ. 



The Epithelium of the Brain Cavities The Toxic Product of Ldfflers' 



— Fish -- 256 Bacillus Diptheriie ----- 265 



A Handy Pho to- M icrogra p h i c Notes. — Tariff on Imported Slides -266 



Camera. — Walmsley - . - - 257 Correspondence.— Boston's Supply 



On a Mooted Matter in the Use of an of Mounts -------- 267 



Eye-Piece in Photo-Micrography. I Microscopical Societies. — Iron 



— Mercer -------- 261 City Society', Pittsburgh, Pa. 



ProcuringAmoeba for the Laboratory. 264 St. Louis Club of Microscopists. 



Medical Microscopy. — Staining Washington, D. C. ----- 267 



Nerve Tissues. Malarial Fevers. Subscribers' Notices ----- 268 



Chas. W. Smiley, Publisher, Washington, D. C. 

 Terms: For the United States, $1.00. For Great Britain, 5 Shillings. 



Copyright, 1890, by Chas. \V. Smiley. All rights reserved. 



