TROPICAL CLIMATES. 771 



Bombay, 1815 .. .. Mussulmans 17 '5 years 



. . Parsees . . 24 



Havannah . . . . . . 33 



Guadaloupe, 1811 to 1824 Whites .. 23-5 



Free Blacks 35 



Martinique 1815 .. Whites .. 24 



.. Free Blacks 33 



Grenada . . . . . Slaves . . 22 



St. Lucia . . . . . Slaves . . 20 



Mean of the whole .. 24'5 



Nor would the general result be materially 

 different, if the Europeans were omitted in the 

 estimate. We also learn from the sixth edition 

 of Dr. J. Johnson's work on the Diseases of Tro- 

 pical Climates, that the average annual mortality 

 of the British troops in Bengal varied from 76*40 

 to 90-69 per 1000, from 1790 till the year 1810. 

 According to the reports of Major Tulloch, it was 

 78-5 per 1000 among the white troops serving in 

 the West Indies, from 1817 until 1836, or above 

 five times greater than in the United Kingdom, 

 where it was only 15*3 per 1000, and nearly the 

 same in British America ; whereas on the western 

 coast of Africa, it varied from 483 to 668-5 per 

 1000. But he states, that among the black troops 

 of Sierra Leone, including the slaves liberated by 

 the English cruizers and settled there, it was only 

 30 per 1000, and about the same as the average 

 annual mortality of the whole slave population 

 throughout the British West Indies. He adds, 

 however, that the mean duration of life among 



