HYDROPHOBIA 



267 



120° C. for twenty minutes. Having prepared the emul- 

 sion of the dog's brain, it is now ready for inoculating into 

 rabbits. A full-grown healthy rabbit is taken and placed 

 upon its stomach on a board which has a hole bored in it 

 at each corner ; its legs are stretched out and fastened by 

 cords, or thin strips of leather, to each hole, and thus 

 made fast. An ansesthetic is now administered, either 

 chloroform or ether, and the animal is soon under its 

 influence. The assistant then holds its head steady, whilst 



Fig. 19. — Babbit foe Trephining. 



the operator, with a sharp pair of scissors, cuts the fur 

 short over the part to be operated upon, and the skin is 

 well washed with a 5 per cent, solution of carbolic acid. 

 Then, with a sharp scalpel he makes an incision of about 

 an inch, extending along the median line at about equal 

 distances between the eyes and ears, cutting down to the 

 bone. A dilator is then inserted to keep the skin apart 

 whilst the operation of trephining is carried out. A small 

 trephine is used of about one-sixth of an inch in diameter. 

 The operator then takes the trephine, and at a point 



