DISEASES OF MANKIND. 783 



The consequence is, that under such circum- 

 stances, they are often found shivering with cold ; 

 but never complain of the most intense heat of 

 the sun, which is no less delightful to their feel- 

 ings than conducive to health : that during win- 

 ter when northerly winds prevail, and the air is 

 much cooler than at any other season, they are 

 extremely liable to catarrh, influenza, pneumonia, 

 pleurisy, and other diseases of the lungs, includ- 

 ing rheumatism, eruptive fevers, dysentery, diar- 

 rhea, colic, and tenanus, all of which are brought 

 on by exposure to cold damp air, a shower of rain, 

 and often by sleeping in damp clothes, by which 

 the circulation through the lungs and general 

 system is greatly diminished and perspiration 

 checked, followed by congestion of the stomach 

 and bowels, or of the pulmonary organs. Nor is 

 it until several generations after his removal to 

 a colder climate, that the thorax of the African is 

 developed to the same extent as that of the Euro- 

 pean; so that, like the monkey, the lion, tiger, 

 and leopard, he is proportionally subject to dis- 

 eases of the lungs. On the other hand, as the 

 lungs are more exercised in temperate and cold 

 climates, the thorax is more highly developed 

 among the whites, who therefore obtain a larger 

 amount of caloric by respiration, ceteris paribus, 

 by which they are enabled better to resist the in- 

 fluence of a low temperature. But for this very 

 reason, when removed to the burning climate of 



