NO. 6 



BODY RADIATION ALDRICH 



15 



metabolism values. Yet even when adequate allowance is made for 

 this, the radiation loss seemed to be an unexpectedly large proportion 

 of the total energy production. 



After conference with Dr. Abbot and several members of the 

 New York Commission on Ventilation, a series of experiments was 

 started with the hope of shedding some light on the amount of body 

 convection loss. These experiments proved that convection was, in- 

 deed, less than had been anticipated, but the close approach of total 

 radiation to basal metabolism remains surprising. 



^^ 



HeRIZONTAL 



VERTICAL 

 Fir 8— Cylindrical copper calorimeters, each 38 cm long and 30.5 cm. 

 diameter," fiUed with water^a'nd completely covered with tight fittmg jackets con- 

 sisting of one thickness of brown canton-flannel cloth. 

 A — Thermometer. 

 B — Stirring device. • 



C— Electrical heating element. 



Two calorimeters were prepared of thin sheet copper, cylindrical 

 in shape, each 38 cm. long by 30.5 cm. in diameter. One was 

 mounted vertically and the other horizontally, each supported on 

 four rubber blocks on the top of four metal rods. This permitted 

 free convection and radiation on all sides but the rate of cooling 

 of the vertical calorimeter might well be less than that of the 

 horizontal because the warm convection currents rising from be- 

 low would more closelv l)athe the sides in the vertical form. Appro- 

 priate stirring and heating devices were inserted as shown m 

 figure 8. Each was filled with a known amount of water, and the 



