GERLACH'S GELATINE. 157 



Roy. Mic. Soc., iii, 1880, p. 504). One part by weight of the 

 finest French gelatin is left for about two hours in 6 parts by 

 weight of water ; 7 grammes of glycerin are added, and fop - 

 every 100 grammes of the mixture 1 gramme of concentrated 

 carbolic acid. The whole is warmed for ten to fifteen minutes, 

 stirring all the while, until the whole of the flakes produced 

 by the carbolic acid have disappeared. Filter whilst warm 

 through the finest spun glass which has been previously washed 

 in water and laid whilst wet in the filter. 



289. Gerlach's Gelatine (GERLACH, Unters. a. d. Anat. List. 

 Erlangen, 1884; Journ. Roy. Mic. /Soc., 1885, p. 541). Take 

 gelatin, 40 grammes ; saturated solution of arsenious acid, 200 

 c.c. ; glycerin, 120c.c. Clarify with white of egg. The mass 

 may be kept for years in a well-stoppered bottle. The 

 objects to be prepared for imbedding by a bath of one third 

 glycerin. 



