SCIENTIFIC PROCEEDINGS. 



Abstracts of Communications. 



One hundred eighth meeting. 



Osborn Memorial Laboratory of Zoology, Yale University, New 

 Haven, Conn. May 22, IQ20. 



Vice-President Wallace in the chair. 

 9i (i55i) 



Additional experiments showing the production of fat from protein. 



By Graham Lusk. 



[From the Physiological Laboratory, Cornell University Medical 

 College, New York City.] 



A dog, which had been fed for two days with 1,000 gm. of 

 meat daily at 8 a.m. and which had had at 5 p.m. on the same two 

 preceding days the usual standard diet containing about 70 gm. 

 of carbohydrate, was given 1,000 gm. of meat at 8 a.m. The 

 respiratory quotients for the fifth, sixth and seventh hours after 

 giving this quantity of meat were 0.842, 0.845 and 0.845. Com- 

 puted on the basis of the metabolism of protein which is the 

 equivalent of 1.44 gm. of urinary nitrogen per hour, there ap- 

 peared to be a retention of material derived from protein which, 

 if it had been burned, would have shown respiratory quotients in 

 the successive hours of 0.708, 0.688 and 0.685. This indicates 

 that the carbon-containing material derived from protein which 

 was retained in the body had a respiratory quotient approximately 

 the same as that of fat. 



For the three hours by direct calorimetry 85.32 calories were 

 found. By indirect calorimetry, if the retained carbon be cal- 

 culated as having been deposited in the form of fat, 83.58 calories 

 may be calculated as the heat which should have been expected to 



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