for Manchefier and Salford, 167 



the inhabitants in 1773, added to 

 29151, gives _ - - - 48681 



From all thefe different views, we may, I 

 think, be authorized to conclude that the num- 

 ber of inhabitants of the two towns, cannot 

 be much lower than fifty thoufand ; efpecially 

 as from a circumftance, of which I Ihall here- 

 after take notice, it is probable that the annual 

 number of deaths is under-rated. 



Dr. Percival, whofe attention was, fome 

 years fince, particularly direfled to the fubjeft 

 of this paper, pointed out a plan of keeping 

 the Parifh Regifter, which, if it had been 

 purfued, would have been produftive of great 

 advantages J and he took pains to afcertain the 

 proportion of deaths by the fmall-pox, to thofe by 

 all other difeafes*. In the courfe of this in- 

 quiry he found that, in a fpace of fix years, 

 from 1769, to 1774, inclufive, the deaths, by the 

 fmall-pox, were nearly one fixth and a half of 

 the wholef . I am happy to obferve that, in the 

 laft fix years, the fatality of this terrible difeafe 

 has abated ; for the deaths by the fmall-pox, 



* Dr. Percival's Efl'ays, vol. III. 



f During the years i772-3-and-4 the deaths by the fmall- 

 pox, in Leverpool, amounted, according to an account, 

 communicated by the late Dr. Dobfon to Dr. Haygarth, to 

 oce in 54 of the whole. 



M 4 • frqm 



