Heating and Cooling of the Body by Local Heat and Gold. 209 



the point JK, 10 minutes from point G-, the difference is 038° C, therefore 

 the rise for 1 minute was - 038° C. The water in the can was 6 litres, 

 therefore the rate of heat loss to the water per minute was 0*228 kilo-calories 

 during this time. 



To determine the total heat loss from the hand during the 20 minutes' immer- 

 sion; the total rise of temperature of the bath was 11'6 C — 97° C. = 1-9° C, 



4 8 12 16 20 24 28 32 36 40 

 Time- Minutes 



Fig. 1, B. 



and that of the control 9-8° 0.-9-3° C. = 0-5° C. ; therefore the total rise due 

 to the hand was 1*9° C — 0'5° C, = 1-4° C, and the total heat loss from the 

 hand 1-4x6 = 84 kilo-calories. 



Fig. 1, B, shows the changes in temperature of the skin over the median 

 vein for the 20 minutes' immersion and the succeeding 20 minutes. The 

 temperature of this portion of skin was quite different from that of the skin 

 around it and nearer the hand, showing that the temperature of the blood 



