in the United States in Fifty Years. 



43 



relative change in their numbers might have been caused by a 

 greater mortality among the males ; by an extraordinary number 

 of runaways to foreign countries, who are chiefly males ; or lastly, 

 by a greater proportion of males of those who had been emanci- 

 pated. As there seems to be no reason to suppose that more males 

 than females were emancipated, the two first causes must be relied 

 on to explain the difference in question ; and neither of them is in- 

 consistent with well-known facts. The instances of escape to 

 Canada have greatly increased within the last twenty years ; and 

 of the slaves who are transported to the south, there is a greater 

 proportion of males, and their lives are probably abridged by change 

 of climate and habits. 



The proportions of the males and females, at different ages, to the 

 whole number of each sex in the several classes,* are as follows : 



1st. Of the whites, 



* It will be perceived that this comparative view differs from that given under the 

 census of 1820. Here the number of males and females, at the different periods of life, 

 are compared with the whole number of the same sex, in the respective classes; but 

 there the same were compared with the whole number of both sexes. In that, the per 

 centage of both sexes is found by adding the separate per centage of each ; here, the 

 same result is obiained by taking the medium per centage of both. 



