INOCULATION OF ANIMALS. IO/ 



of a gelatin capsule is fitted over it, while still warm, so that the 

 gelatin may adhere to the glass. The capsule is now dipped into 3 per 

 cent collodion, covering the gelatin and part of the glass. It is allowed 

 to dry a few minutes, and is dipped again. In all two or three coatings 

 may be given. The capsule is filled with water and boiled in a test- 

 tube with water. The melted gelatin is removed with a fine pipette. 

 The capsule is partly filled with water or broth and sterilized. The 

 capsule may now be inoculated. The narrow part of the neck must 

 then be sealed in the flame, taking care that the neck be dry. The 

 sealed capsule should be placed in bouillon for twenty-four hours. No 

 growth should occur outside the capsule if it is tight. It may now be 

 placed in the peritoneum of an animal. 



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