114 The Microscope. 



the same conditions there is an average diameter of the blood 

 corpuscles of an individual which varies within exceedingly- 

 narrow limits, and that this diameter may be measured with 

 very great accuracy. The limits of error certainly fall within 

 the 1-200,000 of an inch and probably within the 1-250,000. 

 Whether this average diameter varies from time to time is a 

 question not yet determined. — Legal News. 



The Microscope is an illustrated monthly journal edited and 

 published by Charles H. and Louisa Reed Stowell, Ann Arbor, 

 Mich. It is the only journal devoted solely to microscopy, in 

 this country, that can lay any claim to genuine merit. — Bis- 

 toury. 



Koch's "comma Bacillus" appears to be having a hard 

 time of it among the experts. First, Dr. Klein showed his con- 

 tempt of it by swallowing it, and now Dr. Lancaster has the 

 unkind ness to say : First, it is not comma- shaped. Second, it 

 is not a bacillus. Third, it does not always occur in the intes- 

 tines of cholera patients, and Fourth, there is no good evidence 

 that inoculation with it produces cholera. In fact, the poor 

 thing appears to be about annihilated by its critics. Cholera, 

 though, will remain undisturbed by it, and relentlessly claim 

 its thousands of victims as heretofore. 



Professor Stowell, in a recent private letter, speaks en- 

 thusiastically of the present status of microscopical literature 

 in general, and of the prospects of his journal, The Microscope, 

 in particular. He says, that if the outlook continues as bright 

 as at present, he will on December 1st announce an u enlarge- 

 ment." The profession, as well as the professor, is to be con- 

 gratulated, for The Microscope is one of the liveliest and news- 

 iest of our technical journals, and merits all the favor which it 

 is meeting. — National Druggist. 



Prof. Cohn, of Breslau, one of the best authorities on Bac- 

 teria, has recently called attention to the remarkable work of 

 Leuwenhoek done in this same department of research more 

 than two centuries ago, before the compound microscope came 



