62 



The Microscope. 



essay, in which he has clearl}^ and concisely described the means 

 of staining and of examining the bacillus. His method of stain- 

 ing seems to be a good one ; it is at least expeditious, as he 

 claims that the bacillus may be colored and the slide finished 

 in from six to ten minutes, the bacilli, by his methods, being 

 red on a green back-ground. An}^ man with a microscope and 

 two grains of the common sense ordinarily called gumption, 

 can, b}^ following these simple directions, find the bacilli, and so 

 aid himself as well as his patient. The little book should be 

 welcomed, as the reviewer believes it will be. If Dr. Paquin 

 should prepare the stains needed in his method, and sell them at 

 a reasonable price by mail, he would place bacteriological be- 

 ginners and amateurs under increased obligations to him. The 

 illustrations in the book are excellent. 



Staining and permanent preservation of histological ele- 

 ments ISOLATED BY MEANS OF CAUSTIC POTASH OR NITRIC ACID 



By Simon Henr}^ and Mrs. Susanna Phelps, Gage. Reprint. 



On the GERMICIDAL ACTION OF BLOOD SERUM AND OTHER BODY 



FLUIDS. — By T. M. Prudden, M. D. Reprint. 



The metric system and the seventh decennial revision of 

 THE u. s. p. — H. M. Whelpley. Reprint. 



Calendar for 1890-91. Botanical Society of Western Penn- 

 sylvania. 



C°RRESP°nDEnCE 



^^ 



'mmm^mmm 



ufi^^dd^ 



Editor The Microscope : — 



Until I had received the Griffith Club stand which you sent 

 me for examination, I had never seen the instrument, and I am 

 willing to confess that I was prejudiced against it, although " I 



