SECTION ONE 



AQUEOUS MOUNTING MEDIA 



APATHY GUM SYRUP MOUNTANT 



A fairly quick-drying aqueous mountant which sets very hard 

 and may be used in place of Farrant for fat preparations; it is, 

 however, usually definitely acid in reaction. Hardening of the 

 mountant may be hastened if the slides are left on warm plate. 

 Apathy may also be used for ringing glycerine mounts. 



AQUAMOUNT 



A moderately quick-drying, transparent and colourless, aqueous 

 mountant which, unlike Apathy and Farrant, is neutral in reaction. 

 It takes somewhat longer to harden than does Apathy but it is 

 unlike the latter in that it does not tend to crystallize or become 

 excessively brittle. Aquamount is preferable to Apathy or Farrant 

 for fat preparations. 



BERLEZE'S FLUID 



A mountant and killing fluid used in Entomology. Living 

 specimens of Acarina and Insecta are killed by placing them 

 directly into a drop of this fluid on the slide, but specimens which 

 have been stored in alcohol should be washed with io% aqueous 

 acetic acid before mounting. The fluid takes from one to two weeks 

 or even longer to set, after which time the slides should be ringed 

 with a waterproof cement and ringed with a layer of Canada 

 balsam in benzene. 



DOETSCHMAN'S GUM CHLORAL MOUNTANT AND 



STAIN 



This is a modification, containing basic fuchsin, of Berleze's 

 fluid, which kills, fixes, dehydrates, clears, stains and mounts a 

 specimen in one operation. 



This valuable reagent is used in entomology for killing, fixing, 

 dehydrating, clearing, staining and mounting specimens in one 

 operation. Highly chitinized specimens should be treated with 

 10% potassium hydroxide from sixteen to twenty-four hours, 

 then washed well in water before mounting directly into a drop 



E 



39 



