246 INSTANTANEOUS MOUNTING. 



disease. It is, therefore, of the utmost importance that the 

 bodies of birds dying from " Gapes " should be burnt — cremated — 

 as soon as possible after death. By taking a precaution of this 

 kind, and by paying greater attention to the hygiene of the 

 poultry-yard, this terrible Strongnliis may be prevented from 

 slaying annually its thousands of victims. 



3n0tantaneou0 riDountino in jfarrant'e (Bum 

 anb (Bl^ccrinc riDeMuni. 



By R. H. Ward, M.D., Troy, New York. 



TOO much can scarcely be said in favour of Farrant's Gum 

 and Glycerine Medium* for facility of use. It may be 

 inferior to glycerine jelly for mounting sections that are 

 large and not liable to be injured by heating, as both it and that 

 are doubtless inferior to Canada balsam for objects that are not 

 too transparent in the latter, or that can be rendered sufficiently 

 conspicuous by staining, and that can be dehydrated and trans- 

 ferred to the balsam without injurious modification of structure. 

 But it answers excellently for a very large variety of specimens, 

 both animal and vegetable, that can be studied to advantage in 

 water or in glycerine, and that, in the former case, can be trans- 

 ferred to a dense mucilaginous medium without detraction by 

 exosmose. For such objects it very nearly accomplishes the 

 paradox of enabling one to mount specimens without the trouble 

 of mounting them. 



Those who prepare objects for the trade, and students who are 

 working in the laboratories as learners, make a business of the 

 hardening of objects, the cutting of sections, the handling of 



* Farrant's medium is prepared as follows : — 



Picked gum Arabic ... ... 4 parts by weight. 



Distilled water (cold) ... ... 4 ,, ,, 



Glycerine ... ... 2 ,, ,, 



Keep in a glass-stoppered bottle, in which should be put a small piece of 

 camphor. 



