84 THE MICROSCOPE. 



diaphram of the eye-piece upon a stage micrometed, and in- 

 specting the micrometed scale in the ordinary way. He had 

 been at work upon the questions issued by the commit- 

 tee on the subject of the American Society of Micros- 

 copists, and had found considerable difficulty in get- 

 ting the lines of the rule sharply defined. He had, 

 after some experiments, hit upon the plan of using an aper- 

 ture of definite size, which afforded a well defined image, the 

 size of which could be measured without difficulty. In order 

 to measure fractions of spaces, he cut a. narrow slit for a short 

 distance on each side of the rectangular opening, which formed 

 the image, giving a figure something like a cro.ss. The lines 

 of the stage micrometer were sharply defined — while on one side 

 a line could be made coincident with the edge of the aperture, 

 on the other the amount overlapping could, by means of the 

 slit, be easily estimated. 



The meeting then adjourned. 



E. B. Stuart, per H., 



Secretary pro tem. 



At the annual meeting of the State Microscopical Society of 

 Illinois, held at the* Academy of Sciences, Chicago, on Friday 

 evening, April 28, 1882, the following officers were chosen for the 

 coming year : 



President — Dr. Lester Curtis. 



Vice-Presidents — Prof. E. J. Hill and Prof. E. S. Bastin. 



Secretary — ■^^'m. Hoskins. 



Treasurer — W. H. Summers. 



Corresponding Secretary — E. B. Stuart. 



A woman who carries around milk in Paris said a naive thing 

 the other day. One of the cooks to whom she brought milk looked 

 into the can, and remarked with surprise: "Why, there is actually 

 nothing there but water!" The woman, having satisfied herself of 

 the truth of the statement, said: "Well, if I didn't forget to put in 

 the milk." — Medical Advance. 



