14 INTRODUCTION. 



cheap and serviceable substitute. These latter can be 

 obtained from Whitall, Tatum & Co. of Philadelphia, 

 of different sizes and at very small cost. The best 

 size to use for the dog is one holding six or eight 

 ounces. Before using this syringe the piston must be 

 left in water for some time to swell, otherwise it will 

 not work tight in the barrel; though if left too long in 

 the water the trouble will be in the other direction. 

 The method of using the syringe in injecting is de- 

 scribed in Chapter IV. 



