STUDY OF THE EFFECT OF TROPICAL SUNLIGHT. 107 



gently. Although very much exhausted, the rabbit slowly 

 recovered. In ten or fifteen minutes it stood up and in half- 

 an-hour begun licking its paws. Doubtless it could not have 

 stood the exposure a few minutes longer. 



In the table it i.s to be noted that the temperatures of the three rabbits 

 are often piven for the same minute. This is not strictly correct, but 

 is meant to signify that the temperatures were taken quickly one after 

 the other and that less than one minute intervened between the first and 

 the last readinjrs. All the rabbits passed faeces; fir.st, the black, then 

 the pray, and then the white. The black rabbit died very suddenly with 

 quivering and two sharp squeals. The gray did not die so suddenly as 

 the black, but showed the same twitching of the muscles and jerking of 

 the head, and gave a squeal at death. 



The necropsies showed the following results : 



BLACK RABBIT. — NECROPSY, 11. 2r. A. M., MAY 2'^, 1911. 



Brain, superficial vessels somewhat injected. No extravasation of blood 

 beneath pia-arachnoid. Lung, hyperaemic and rather dark. Heart, 

 apparently normal. Liver, hyperaemic. Spleen and kidney, apparently 

 normal. 



GRAY RABBIT. NECROPSY 11.40 A. M., MAY 22, 1911. 



Brain, superficial vessels somewhat injected. No extravasation of blood 

 beneath pia-arachnoid. Heart, inner surface of the wall of the left ventricle 

 hyperaemic. Lungs, hyperaemic; rather dark in color. Liver, hyperaemic; 

 soft, probably fatty. Spleen, surrounded by masses of fat. Apparently 

 normal. 



The necropsies were performed by Dr. David G. Willets. 



A DISCUSSION OF THE PROPER CLOTHING FOR A TROPICAL CLIMATE. 



Clothing for the Tropics must be adapted not only to the 

 climate and the physical characteristics of the wearer, but also 

 to the work being performed and the amount of protection 

 required against dust-laden winds, rains, and the bites of insects. 

 The only questions here considered are protection against the 

 heat and light of the sun. 



There can be no doubt that the skin temperature will rapidly 

 rise to heights above that of the blood if exposed to the sun 

 under some kind of clothing, and in some cases, in the absence 

 of clothing. If work is performed during the exposure, this 

 rise will be accelerated. The measurements of skin temperatures 

 have been discussed previously and in the following table a few 

 observations of temperatures under clothing are recorded. 



