'1 HE MlCKOSCOPE. 337 



Dr. Riehl donated a slide of a very minute larval form of insect, 

 in which the vascular system was particularly clearly shown. 



A varied assortment of entomological, botanical and mineralogi- 

 cal specimens was donated by F. L. Howard, who had collected 

 them on the slopes of Mount Shasta. Some peculiar varieties of 

 porous obsidian attracted much attention. 



Mi\ Riedy stated that the work of stamping the books, plates, 

 etc., in the library, with the cut recently adopted by the Society, had 

 been commenced and would soon be completed. 



The meeting thereupon adjourned to the 14th prox. 



A. H. Breckenfeld, Secretary. 



AMERICAN POSTAL MICROSCOPICAL CLUB. 



\ FTER the usual summer vacation, the work of the Club is now 

 ■^ -^ being resumed, and the boxes will be started in a few 

 days. By withdrawing many of the old boxes it is hoped that the 

 average quality will be materially improved, and an effort will be 

 made to cii'culate an increased supply of Cole's or other professional 

 work. 



Printing is now in hand and arrangements are being made for 

 the coming season; and any changes of address, or other business of 

 importance in this connection, should be reported at once to the 

 Managers, 53 Fourth street, Troy, N. Y. 



ST. LOUIS CLUB OF MICROSCOPISTS. 



THE regular monthly meeting of this Club, held at the College 

 of Pharmacy, Tuesday evening, October 11, was devoted to 

 the entertainment of the students of the College, who had been 

 invited to be present. A very enjoyable time was had. 

 The next meeting occurs Tuesday evening, Nov. 1. 



ELEMENTARY DEPARTMENT. 



NINTH LESSON. 



"cleanliness is akin to godliness." 



CELLS. — A cell is formed by interposing something between 

 the slip and cover-glass, thus allowing a space for the 

 specimen and mounting- medium in which they are partially or en- 

 tirely relieved from pressure. The object of a cell then is to 

 prevent the disarranging or crushing of the parts of the specimen 



