The Microscope. 319 



as few microscopists can do. The book will therefore be useful, 

 and should stimulate the study of these insects. It is freely dis- 

 tributed to all that ask. 



Studies on the etiology of diphtheria. Second Series. T. 

 M. Prudden, M. D. Reprint. 



Erythronium messachoreum, n. sp. Prof E. B. Knerr. Reprint. 



A consideration op some parts of a microscopic stand, of 

 interest to pharmacists. Dr. H. M. Whelpley. Reprint. 



Studies on the action op dead bacteria in the living body. 

 T. M. Prudden and E. Hodenpyl. Reprint. 



Artesians wells and water horizons in Southern New Jer- 

 sey. Lewis Woolman. Reprint. 



Practical intestinal surgery. F. W. Robinson, M. D. 

 Physician's Leisure Librar3\ Detroit; Geo. S, Davis. Price 

 25 cents. 



Academy of Science and Art of Pittsburg. Special circular. 



Proc. Oregon State Pharmaceutical Association. Portland. 



Editor The Microscope : — 



Having had the good fortune, a short time ago, to be allowed 

 the examination of a new ^ and | inch positive ocular of such a 

 superior character as to excel in quality anything that I have ever 

 seen, I believe your readers will be interested to hear about them. 



These oculars are constructed on the Huyghenian principle 

 from a new formula. 



The ^ and | inch were carefully compared with the eye-pieces 

 of various makers of international reputation and found supe- 

 rior to all. 



