12 The Microscope. 



not follow the same course with men. He is no longer experiment' 

 ing, he is curing. He is obliged to wait until his cure is complete 

 and absolute. When the last of his patients is a well man, he 

 will speak, and we shall know all. Before then he will say noth- 

 ing. This is the cause of his delay in satisfying a public curious 

 and anxious to know all. These are the sorts of discoveries that 

 open up the infinite horizons of science and elevate to the high- 

 est pinnacle the one who has conducted the experiments ; and 

 one is compelled to respect the true savant, Avho fears notoriety, 

 and who will quietly and modestly bestow, some day, this cure 

 upon humanity, without any recompense (in spite of offers of 

 all kinds, which come to him from every side), without any 

 other profit than adding one more leaf to the already beautiful 

 crown of that modern science of which the French genius, in 

 the person of the great Pasteur, has furnished the elements, 

 founded the principles, and brought about such magnificent re 

 suits. 



REFERENCE TABLES FOR MICROSCOPICAL WORK. 



COMPILED BY PROF A. B. AUBERT, 



II. 



PRESERVATIVE AND MOUNTING MEDIA. 



Gum with chloral hydrate '. gum Arabic, chloral hydrate, 

 water, A cylinder 60c,c. contents is filled f with gum Arabic in 

 pieces ; to this is added a solution of chloral hydrate (several 

 per cent,) containing 5—10 per cent, of glycerine ; shake often ; 

 in a few days the gum will dissolve; the syrupy liquid is filtered. 

 Carmine and hfcmatoxylin stained objects can be mounted in 

 this medium. 



Gum and acetate oe potash or of ammonia r gum Arabic, 

 acetate of potash or of ammonia, glycerine, water. Made as the 

 preceding medium, only a solution of potassic or ammonic ace- 

 tate is used instead of a solution of chloral. Anilin stained ob- 

 jects can be mounted in this. 



Iodized serum, artificial (Ranvier) r 1, distilled watef, 135 

 grms.; 2, egg albumen, 15 grms.; 3, common salt, 0,2 grms.; 4, 

 tincture of iodine, 3 grms. Mix 1, 2 and 3, and filter; add 4, 

 and filter again. Used for examinations, not for mounting, 



Potassio-mucuric iodide (Stephenson): biniodide of mercury, 

 iodide of potassium, water. To the water add an excess of each 



