CERTIFICATE A 



321 



a rabbit, or the intra-peritoneal inoculation of an 

 animal with a particle of cancerous tissue — there 

 the licensee must hold, together with his license, 

 Certificate B, because the act of inducing the 

 disease is itself an operation, done under an anaes- 

 thetic. If the animal be a dog or a cat, he must 

 hold Certificates B and EE ; if it be a horse, ass, or 

 mule, Certificates B and F. 



Where the act of inducing the disease is not 

 itself painful — as in ordinary inoculation, and in 

 feeding - experiments — the licensee must hold, 

 together with his license, Certificate A, because 

 the animal is not anaesthetised. It is not a painful 

 operation ; the experiment consists not in the 

 act of putting the hypodermic needle under the 

 animal's skin, but in the subsequent observation 

 of the course of the disease. Take, for instance, 

 the inoculation of a guinea-pig with tubercle- 

 bacilli : the experiment is the production of 

 tubercle ; the experiment lasts till the animal is 

 killed and found to be infected ; it is therefore 

 scheduled under Certificate A. Or take the testing, 

 on an animal, of an antitoxin ; the experiment is 

 not the injection, but the observation of the result ; 

 the animal may not suffer, but the injection must 

 still be done under Certificate A. And, if the 

 animal be a dog or a cat, the licensee must hold 

 Certificates A and E ; or, if it be a horse, ass, or 

 mule, Certificates A and F. 



This want of a special certificate for inocula- 

 tions is an important matter, because it has led 

 to the belief that painful operations are performed, 



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