41 EQUIPPING OF LABORATORY. 



with the various reagents, which can be washed off directly into 

 the tray beneath and thus prevent table or hands being soiled by 

 the stains or clearer. It is very convenient to have a small supply 

 of alcohol and water in bottles elevated at a little distance on a 

 shelf, and provided with a siphon having rubber connections below 

 to enable it to be used in various parts of the table. The orifice of 

 the glass tip should be small and the rubber tube provided with 

 a pinch cock to regulate the supply at pleasure. This arrangement 

 will be found very convenient to keep knife and tissue wet while 

 sectioning tissue imbedded in collodion, and also for dehydrating 

 and washing the sections on the slide. 



For the clearer, a wash bottle should be pi-ovided with an 

 enlargement at the inner end of the exit tube filled with cotton, 

 thus preventing any particles of dirt from getting into the clearer 

 used on the slide. The enlargement can be made by cutting off 

 from the end of a glass tube, just small enough to enter the mouth 

 of the flask, a piece about 5 c. m. long. Close one end with a cork 

 and pass through a hole in this exit tube. Then fill the piece of 

 tubing loosely with cotton. A similar bottle will be found very 

 useful for the haematoxylin. (Fig.3.) Many devices will be suggested 

 in the laboratory from time to time and materially lighten the burdens 

 incident to having the charge of so much laboratory instruction. 



