With respect to my own calculations on this subject, I endeavoured to find out whether the Small Pox proved equally fatal after the time mentioned by the Doctor. With this view, before I left England, I procured the Bills of Mortality of the City of London for the last thirty-four years, excepting two, which could not be found. Of these I made a table, which I have added at the end of this treatise. I was surprized to find the number for these thirty-two years past tally so exactly with the observations made by Dr. Jurin. On examining the table it appears, that within these last thirty-two years 760,098 persons have died, and of those 268,529 have been infants under two years of age, which agrees with Dr. Jurin’s calculation, in being rather more than one-third of the whole. I suppose, with Dr. Jurin, that the deaths of these were occasioned by different diseases incidental to infancy, and I deduct them out of the whole number, viz. 760,098 268,529 ─────── The remainder is 491,569 It appears likewise that in the same course of time there died of the Small Pox 66,515, which confirms Dr. Jurin’s account, and indeed exceeds the eighth part. Hence we may fairly conclude, that in general the Small Pox carried off the eighth part of those who died in London in the period abovementioned. I procured also the best accounts I possibly could of the whole number of those who had had the disease from places where the Small Pox had raged most, and found, that near one out of five died who had had the disease in the natural way. This also agrees with Dr. Jurin’s observations. We see then that even in London, where the climate is temperate, the disease well known, and the treatment of the sick very ably conducted, this single disease destroyed more than the eighth part of the inhabitants. But if we turn our eyes towards other dominions, and give credit to the accounts told us, we shall find the disease still more fatal, and in some cities it is almost as destructive as the plague. It is impossible for me to ascertain with any degree of certainty, the precise number of persons who die annually of the Small Pox in Russia. I am persuaded however, both from good intelligence as well as my own observations, that it is exceeding fatal here. Though I cannot confirm this assertion by proofs, yet from some conversation with the learned I am credibly informed, that of those who have the Small Pox in the natural way one-half die, including the rich and poor.