Microscopy. 563 
MICROSCOPY.! 
IMPROVEMENTS IN THE PARAFFIN AND CELLOIDIN METH- 
safeguard against brittleness and loss or displacement of loose parts. 
But the celloidin method is complicated, and does not admit of very 
the serial arrangement of section can be accomplished with the 
. Lhe Celloidin-Parafin Method.—1. The object to be sectioned 
8 placed in strong alcohol (97 per cent.) until dehydrated or until 
fully saturated, 
2. It is then placed in a mixture of equal parts of ether and 
alcohol until saturated, the time varying with the size of the object. 
- It is then transferred to a solution of celloidin, prepared as — 
usual in equal parts of alcohol and ether, and in which it is allowed 
to remain for twenty-four hours. 
ty y object is then placed in oil of origanum until saturated, 
uch will be in from one to two or three hours according to the 
Size of the object. 
aukee by C. O. Whitman, Director of the Lake Fanors Mil- 
eitschr. f. wiss. Mi ie, iv., 1, p. 48, 1887. 
Mig ` A. Ryder. Celloidin Paraffin’ ethos of Embedding. The 
Poscopical Bulletin and Science News, Dec., 1887, p 43 
