112 THE ACTION OF THE LIVING CELL 



cats were periodically injected subcutaneously with a 

 cytost extract prepared from autolyzed muscle as de- 

 scribed on page 94. The injections differed from 

 those used in previous experiments only in that the 

 dosage was carefully regulated to 0.25 cc. per kilogram 

 of body weight. The animals were injected for a pe- 

 riod of from one to eight months. In each instance the 

 cats gained in weight, while a series of control animals 

 of approximately the same age and weights, kept un- 

 der identical conditions, did not exhibit any marked 

 increase in weight. Data concerning ten cats treated in 

 this way are summarized in Table X. (Turck, 1921 ) . 



TABLE X 



Aside from the increase in weight, these animals 

 had a general appearance equalled by but few of the 

 non-treated animals. Their coats were sleek and their 

 muscles firm and free from fat. Likewise, they showed 

 a playfulness and courage which are quite uncommon 

 in old cats. When injured, their wounds healed rap- 

 idly without suppuration. Two years after these ex- 



