1885.] NEW-YORK MICROSCOPICAL SOCIETY. 191 



the escape of moisture. The cell is best fastened to the slide 

 with liquid marine glue, or with a solution of white shel-lac in 

 methylated spirit, put on the slide with a brush. 



" Much has been said against the use of white-zinc cement. 

 When this preparation is of superior quality, like that furnished 

 by Mr. Walmsley, and is properly treated, I find it an 

 excellent material for shallow cells. Either white shel-lac dis- 

 solved in methylated spirit, or a certain preparation called ce- 

 ramic glazing, will, if applied with a brush to the white-zinc ring, 

 effectually protect the mounting medium. 



" The formation of fungus-growths on the under-side of the 

 cover-glass can always be prevented by the application of the 

 smallest possible quantity of carbolic acid before the cell is 

 closed. 



" The best way, I think, of cleaning cover-glasses is to im- 

 merse them for five or six minutes in nitric acid and stir them 

 about with a glass rod. The acid is then decanted, and the 

 covers, after being thoroughly washed with water, are placed in 

 alcohol in a wide-mouthed bottle, and are ready for use." 



ADJOURNMENT TO OCTOBER SECOND. 



The President : " The next meeting of the Society, which 

 will take place October 2d, will have a somewhat social char- 

 acter, like the meeting of this evening. It is hoped that the 

 members will bring to us at that time many interesting 

 and valuable results of their summer observations and expe- 

 riences." 



Vacation, — With the publication of this, the July Number, 

 the Journal enters upon a three months' vacation. It takes 

 this occasion to thank other scientific Journals for their ex- 

 pressions of good will, and it wishes them a summer of unusually 

 agreeable work. 



