The Microscope. 347 



glycerin, ammonia, of each, 1 J oz. ; mix. It requires about two 

 weeks for the gum to dissolve. It should be shaken occasionally and 

 finally strained through fine muslin without pressure. This medium 

 hardens at the edges of the cover in a few hours, when the latter may 

 be cleaned and sealed with any desired cement. C. M. Vorce recom- 

 mends the use of a bright steel knitting-needle for stirring the 

 above mixtiu-e, or Farrant's solution, as fewer air bubbles are formed. 



ABSTRACTS 



LOUIS PASTEUR. 



The Popular Science News publishes the following excellent 

 sketch of Pasteur, whose reseaches on the prevention of hydropho- 

 bia by inoculation have rendered him famous all over the world. 



Although he is most widely known in connection with this method, 

 his discoveries in other directions have been of much more pi'actical 

 importance than the inoculation with the modified virus of rabies, 

 the actual value of which is still uncertain. True, hydi'ophobia is 

 such a rare disease, and presents so many varying aspects, that a 

 long time m.ust necessarily elapse before any plan of treatment can 

 be said to be absolutely specific. 



