Mountijig Media (nionntants) 121 



Dissolve gum arabic in water, add chloral hydrate and then glycerol. 

 Filter. 



3. THIN FORMULA. 



distilled water 100.0 ml. 



gum arabic (acacia) 60.0 gm. 



glycerol 40.0 ml. 



saturated aqueous solution of chloral hydrate . . 100.0 ml. 



Monk's Karo Medium (1938) 



white Karo syrup 5.0 ml. 



Certo (fruit pectin) 5.0 ml. 



water 3.0 ml. 



thymol for preservative 



This is recommended for motuiting a grotip of small parts which are 

 easily disarranged. A thin layer is spread on a slide and the parts to 

 be motmted are removed from glycerol and immediately arranged 

 in the mediiun. The mixture begins to set in about 2 minutes, and 

 holds parts in place. Dry to hardness over heat. Cover glass can be 

 added with a drop of mixture or with Euparal. If using mixture, use 

 enotigh to prevent air poc kets from forming Avhen the medium dries. 



Lacto-phenol Mounting Medium 



melted phenol (carbolic acid) 3 parts 



lactic acid 1 part 



glycerol 2 parts 



distilled water .......... 1 part 



CMC- 10 Mounting Medium 



This is a nonresinous motuiting medium supplied by General Bio- 

 logical Supply House. It is primarily for small arthropods, such as fleas, 

 ticks, mites, etc., but cannot be used for stained material. Small speci- 

 mens containing little air can be motmted directly, but larger ones are 

 motinted from water or alcohol. 



Yetwin's Mounting Medium for Nematodes and Ova (1944) 



10% bacto-gelatine, granular, Difco 150.0 ml. 



glycerol .... 50.0 ml. 



1% chromium potassium sulfate aqueous 



(chrome alum) 100.0 ml. 



phenol (carbolic acid), melted 1.0 ml. 



