Vol. XI, No. 12. DECEMBER, 1890. 



No. 132. 



The American 



MONTHLY 



SCOPICIL JOyRNAL 



CONTAINING 



CONTRIBUTIONS TO BIOLOGY. 



CONTENTS 



Microscopy for Amateurs. — White - 269 



Diatoms: Their Life-History and 



Their Classification.— Carter - 276 



List of all Patents for Improving the 

 Microscope issued in the United 

 States from 1853 to 1890 - - - 2S0 



Bacteriology. — (Germicidal action 

 of Blood-serum and other Body 

 Fluids. Bacteria in Milk - - - 2S1 



Biological Note.s. — Vitality of Vege- 

 tal Tissue. Experiments on 

 Hydra. Fresh-water Algie. Di- 

 atoms. Pollen. Cell Nucleus. 

 Striped Muscular Fibre. Ances- 

 try of Insects ------- 



Notices of Book.s. — Allen - - - - 



Subscribers' Notices - - - - - 



282 



28., 



28.1 



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

 Terms: For the United States, $L00. For Great Britain, 5 Shillings. 



WASHINGTON 

 Gibson Brothers, Printers 



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



