242 PRESERVATIVE LIQUIDS. 



modification of FARRANT'S medium, Zool. Anzeig., ii, 1879, 

 p. 575). 



Gummi arab. ...... 5'0 



Aquae ....... 5*0 



To which after twelve hours are added 



Glycerini 5'0 



Sol. aquosa acid, carbol. (5-100) . . lO'O 

 Marine animals may be preserved in this by simply run- 

 ning in a drop under the cover, and next day or later adding 

 what is necessary to make up for evaporation, and closing 

 the mount. Shrinkage is very slight, and most colours keep 

 well. 



397. FARIS'S Glycero-Gum (The Microscope, x, 1890, p. 59; 

 Journ. Eoy. Mic. Soc., 1890, p. 414). Gum arabic, 2 ounces; 

 glycerin, 1/5 ounces; water, 1'5 ounces; thymol, 1 grm. 

 Mix, dissolve with heat, and filter. 



398. Gum and Glycerin Jelly (SHIMER, The Microscope, ix, 

 1889, p. 138; Journ. Eoy. Mic. Soc., 1890, p. 411). Equal 

 parts of glycerin jelly (Foi/s second formula, post, 412),. 

 Farrant's solution, and glycerin. 



399. COLE'S Gum and Syrup Medium (see above, 317). 



400. APATHY'S Gum and Syrup Medium (see above, Chap* 

 IX, 119). This medium is recommended by Apathy in a 

 general way, and not merely for the special purpose for which 

 it is quoted in 119. It sets very hard, and, combined with a 

 paper cell (see Chap. XX), may be used for ringing glycerin 

 mounts. 



401. Fabre-Domergue's Glucose Medium (La Nature, No. 823, 

 9 Mars, 1889, supp.). 



Glucose syrup diluted to twenty- 

 five degrees of the areometer 

 (sp. gr. 1-1968) . . . 1000 parts. 



Methyl alcohol .... 200 



Glycerin 100 



Camphor, to saturation. 



The glucose is to be dissolved in warm water, and the other 

 ingredients added. The mixture, which is always acid, must 

 be neutralised by the addition of a little potash or soda. 

 This medium is said to preserve without change almost all 



