Hormone in Plant Tissue 



323 



That this hormone will be useful in the treatment of diabetes 

 mellitus in the human subject there can be little doubt. Judging 

 by the results obtained on diabetic animals it will in some ways 

 be much superior to "Insulin." Its effect develops slowly and is 

 long maintained. The fact that relatively crude extracts of many 

 plant tissues are practically non-toxic is also a factor of great 

 practical importance. A few results are indicated in Table 1. 



TABLE l. 



Animal. 



Source of extract. 



Blood sugar. 







Control. 



Low point. 





Yeast 



0.110 



0.046 



Normal rabbit 



Yeast 



0.118 



0.046 



Normal rabbit 



Yeast 



0.080 



0.038 



Normal rabbit 



Onion 



0.118 



0.058 



Normal rabbit 



Lettuce 



0.094 



0.056 



Normal rabbit 



Wheat leaves 



0.103 



0.065 



Normal rabbit 



Wheat leaves 



0.106 



0.058 



Normal rabbit 



Bean greens. 



0.095 



0.065 



Depancreatized dog 



Onion 



0.190 



0.090 



158 (2118) 



Evidence of the dynamic importance of auricular systole in man. 

 By HAROLD S. FEIL and LOUIS N. KATZ. 



[From the Medical Clinic of Western Reserve University at City 

 Hospital, Cleveland, Ohio.} 



Considerable discussion has arisen as to the dynamic impor- 

 tance of auricular systole. Some of the differences of opinion 

 are no doubt due to the fact that the vigor of auricular contrac- 

 tion varies considerably under different experimental conditions. 

 The idea has occurred to many that evidence of the dynamic im- 

 portance of auricular systole might be obtained in man by com- 

 paring the ventricular efficiency during normal action with that 

 found in auricular fibrillation. But nothing has come of this 

 suggestion because no adequate criterion for comparing the ven- 

 tricular efficiency had been found. In this report we wish to 

 suggest that an accurate study of the duration of total ventricu- 



