Thirdly, By the particular diseases which were prevalent among them, and which were in some instances to be attributed to too severe labour, or rigorous treatment, and in others to insufficient or improper food.

Fourthly, By those diseases, which affected a large proportion of negro-children in their infancy, and by those, to which the negros newly imported from Africa had been found to be particularly liable.
10.

That the whole number of the slaves in the island of Jamaica in 1768 was about 167,000, in 1774 about 193,000, and in 1787 about 256,000: that by comparing these numbers with the numbers imported and retained in the said island during all these years, and making proper allowances, the annual excess of deaths above births was in the proportion of about seven-eighths per cent.; that in the first six years of this period it was in the proportion of rather more than one on every hundred; that in the last thirteen years of the same it was in the proportion of about three-fifths on every hundred; and that a number of slaves, amounting to fifteen thousand, perished during the latter period in consequence of repeated hurricanes, and of the want of foreign supplies of provisions.
11.

That the whole number of slaves in the island of Barbadoes was in the year 1764 about 70,706; in 1774 about 74,874; in 1780 about 68,270; in 1781, after the hurricane, about 63,248, and in 1786 about 62,115: that by comparing these numbers with the number imported into this island (not allowing for any re-exportation), the annual excess of deaths above births in the ten years from 1764 to 1774 was in the proportion of about five on every hundred; that in the seven years from 1774 to 1780 it was in the proportion of about one and one-third on every hundred; that between the year 1780 and 1781 there had been a decrease in the number of slaves of about five thousand; that in the six years from 1781 to 1786 the excess of deaths was in the proportion of rather less than seven-eighths on every hundred; that in the four years from 1783 to 1786 it was in the proportion of rather less than one-third on every hundred; and that, during the whole period, there was no doubt that some had been exported from the island, but considerably more in the first part of this period than in the last.
12.

That the accounts from the Leeward Islands, and from Dominica, Grenada, and St.Vincent's, did not furnish sufficient grounds for comparing the state of population in the said islands at different periods with the number of slaves, which had been from time to time imported there and exported therefrom; but that from the evidence which had been received respecting the present state of these islands, as well as that of Jamaica and Barbadoes, and from a consideration of the means of obviating the causes, which had hitherto operated to impede the natural increase of the slaves, and of lessening the demand for manual labour, without diminishing the profit of the planters, no considerable or permanent inconvenience would result from discontinuing the further importation of African slaves.
These propositions having been laid upon the table of the house, Lord Penrhyn rose in behalf of the planters, and, next after him, Mr.Gascoyne (both members for Liverpool) in behalf of the merchants concerned in the latter place.