484 



BOARD OF AGRICULTURE. [Pub. Doc. 



The syringe (fig. 2) has a capacity of five cubic centimeters, 

 and the piston is graduated from one to five, each division being 

 subdivided with half and quarter notches. The screw regulator 

 (fig. 2, sr) may be placed at any mark on the piston, thus insuring 

 that the animal to be vaccinated receives only the exact dose in- 

 tended for it. The plunger (fig. 2, pi) is made of rubber ; it 

 should fit air-tight in the glass barrel, and still be susceptible of 

 being moved up and down smoothly. By means of the milled 

 head (fig. 2, mh) at the free end of the piston the rubber of 

 the plunger may be expanded or contracted simply by screwing 

 the head to the right or left. By this arrangement a close fit 



Fig. 1. — Vaccinating Outfit.* 



may always be obtained without taking the syringe apart. If 

 the plunger should become dry. or for other reasons not move 

 smoothly up and down in the barrel, it is necessary to unscrew the 

 milled cap c and pour a drop of glycerine into the barrel. For 

 this purpose a small bottle of glycerine is furnished with each out- 

 fit ; oil or grease should never be used, as these substances destroy 



* A complete vaccinating outfit, including hypodermic syringe, can be obtained 

 from Z. D. Gilman, 627 Pennsylvania Avenue, N. W., Washington, D. C, for the 

 sum of four dollars. The outfit is prepared by the firm named in accordance with 

 the plans of this Bureau, to meet the temporary demand that may arise in intro- 

 ducing this vaccine. If vaccination should lie extensively adopted as a preventive 

 of this disease, similar outfits will no doubt be for sale by other dealers furnishing 

 this class of supplies. Until this may be the case, the unusual course of mention- 

 ing a dealer by name in a department publication is followed. 



