THE MICROSCOPE. 57 



Oil of cloves, twenty-four hours (did not wish to imbed till next 

 day); then. 



Turpentine stir half-an-hour. 



Turpentine and parafiline, one hour. 



Paraftine, one hour. 



It should be rementbered that these cords imbed easily. 



One caution further — select parafifine if possible, which is 

 bluish-transparent and which rings slightly when struck. The 

 white, opaque sort is by no means as good. Any addition of paraf- 

 fine-oil, turpentine, etc., to soften the parafifine, renders it granular 

 and brittle, and is decidedly injurious in its cutting qualities. — E. A. 

 Birgs, in American Monthly Microscopical Journal. 



Rabies. — This obscure subject has been aow approached by 

 the famous experimenter on germ-diseases, L. Pasteur, in conjunc- 

 tion with Messrs. Chamberland, Roux, and Thuillier. The view 

 long supported by Dr. Duboue, that the central nervous system, and 

 above all the medulla oblongata connecting the spinal cord with the 

 cerebrum and cerebellum, is the seat of the development of the dis- 

 ease, had been disputed by Prof. V. Galtier, v;ho found indications 

 of virus only in the lingual glands and on the mucous membrane of 

 the mouth and pharynx, and not in the above-named parts of dogs 

 affected with the disease. Pasteur and his companions have, how- 

 ever, often successfully inoculated the medulla oblongata, the cere- 

 bro-spinal fluid, and the frontal portion of one of the hemispheres. 

 The period of incubation before manifestation of its effects has 

 hitherto been found to be uncertain, and often long, but this period 

 can now be diminished by inoculating the surface of the brain 

 directly with pure brain substance removed from a mad dog: in this 

 case, the symptoms of madness, either under its silent or furious 

 form, appear within a fortnight of the operation, and death ensues 

 in less than three weeks from the same date. This method has 

 never — as in so many other cases — failed in producing the dis- 

 ease. 



The results of some experiments with the active elements of 

 rabies have led Prof. Galtier to some important conclusions. Six 

 sheep and four rabbits inoculated af different times with this poison 



