242 



THE MICROSCOPE 



used, let the specimen remain in it from two to four days. Place 

 it on a slide and mount in Canada balsam. This is very good for 

 whole sections of eyes and morbid and normal tissues. When 

 cutting flood the knife with alcohol. If further particulars are 

 desired, a similar method is given \x\ Journal of Anatomy and Phy- 

 siology (Oct., 1884). 



Embedding in Gum.— A paper box is filled with a very concen- 

 trated solution of gum arable. In this is placed the object from 

 which the water has been drawn by means of alcohol. The whole 

 is then placed in alcohol for two or three days, and is then in a 

 proper condition for cutting. The sections are to be washed with 

 water. 



1 



To Embed tlie Wax Mass for Cutting.~A piece of stout paper 

 is taken, 6 inches long and 3 inches broad. This is doubled into 

 three longitudinal folds. After this from each end folds of two 

 inches long are marked off. The paper is then opened out, and 

 of the three longitudinal folds the middle one forms the bottom 

 and the lateral ones the sides of the paper box. The ends are 

 made from the middle part of the end folds. The ends of each 



