Biological Laboratories 



85 



virus pigs may be cited. Instead of the usual method of 

 cutting the pig's throat and catching the spurting blood in 

 an open pail, a hollow canula knife is inserted in the 

 carotid artery and the blood collected in closed bottles, 

 without contact with the body of the animal or the open air. 

 In the defibrination of blood in our laboratories, the usual 

 whipping of the blood in open vessels by means of a long 

 fork, gives place to an electric whirl, in which the blood is 

 tightly sealed in sterile bottles, thus avoiding even air con- 

 tamination. Similar precautions safeguard the collection of 

 blood from serum-producing hogs. 



From beginning to end, equally efficient measures pro- 

 tect each step of our operations from the danger of contam- 

 ination in our finished products. Our complete line of 

 veterinary biologies are produced under United States Gov- 

 ernment license and inspection, and are identified by United 

 States Veterinary License No. 6. While each of our products 

 comply fully with all official tests and regulations, in many 

 ways our own tests and requirements are more stringent 

 than, and are in excess of, all government regulations. 



No scientific means is omitted that will add to the 

 safeguards of the potency and purity of our products. 



