144 CARNEGIE INSTITUTION OF WASHINGTON. 



dividuals decreases with age. The statistical analysis shows that the 

 body-surface law, according to which the heat production of an organ- 

 ism is proportional to its superficial area, is not strictly valid, but the 

 basal metabolism in men is, on the average, higher than in women, and 

 the actual heat production in men is higher than in women, even when 

 the difference in physical make-up is taken into account ; but no special 

 difference is obtained in infants of the two sexes. 



BIOMETRIC MISCELLANY. 



Dr. Harris has undertaken, with the aid of his computing force, to 

 make certain statistical studies on variation, correlation, and prob- 

 able error on plot tests in cooperation with the Office of Western 

 Irrigation Agriculture and the Office of Dry Land Farming of the 

 United States Department of Agriculture. 



