336 H, L, Smith on a Finger for the Microscope. 
and turning back the head ¢, the hair will again appear in the 
right place for use. ; 
It will frequently happen that the hair will gather up consid- 
erable dirt and must be cleansed; thisis readily done by slightly 
scraping it, without removing from the forceps, by the edge of 
a sharp, clean knife. The little spring of the hair as the knife 
edge slips off the end, will readily throw off all the loosened 
irt. If too much dirt is picked up with the diatom, or other 
object, it may first be deposited upon a cleaner place of the 
slide, and again picked up freed from most if not all the foreign 
material. 
obtain views very difficult to be had from balsam mounted 
very necessary to have them mounted on a clean slide, and 
themselves free from dirt. If the diatoms stick too firmly to be 
raised by the hair, they can generally be loosened by strongly — 
i I 
sey, Sa f 
finger” will be duly ty a and prove fully capable © 
for it. 
* See this Journal, Sept. 1865, 
