340 Mr. Lubbock oh the Comparison of 



Table IX. shews the ratios of the diseases to which the deaths 

 have been attributed at difterent periods in the London Bills. 

 Measles seem to have increased ; so little dependence, however, 

 is to be placed on these documents, that I forbear making any 

 further comments upon them. The column headed America is 

 taken from the Bills of Mortality for Boston, New York, Phila- 

 delphia and Baltimore, and that for Carlisle from Mr. Milne's 

 work on Annuities. 



I have also endeavoured to determine from the Bills of 

 Mortality, as given in the Annual Register for the ten years 

 from 1810 to 1820, the mortality and the births in London at 

 different seasons, see Table XII. The burials amounted during 

 this period to 197,695, and the christenings to 245,287. 



The returns however are made so very irregularly, that these 

 results notwithstanding the very large numbers from which they 

 are formed are by no means accurate, for the parish clerks, as 

 I find by examining the Weekly Bills, generally return the deaths 

 and christenings of several weeks together. I have annexed 

 observations of a similar kind given by Mr. Quetelet and Mr. 

 Milne, and a Table for Glasgow, which I have deduced from 

 the Bills of Mortality for that city for the years 1821 to 1827, 

 the total number of burials during that time was 31,245. 



In London the mean monthly price of wheat varies very 

 little, if at all, the same is the case with the barometer; the 

 variation therefore which takes place in the number of deaths 

 and christening.s, must be principally owing to the variations 

 in the temperature. The mean number of christenings in any 

 month, in a given place, will also be affected by the mean 

 time which christening is delayed after birth in that place. 

 All the results given in Table XII. have been reduced to the 

 radix 1200, and are corrected for the unequal lengths of the 

 months. 



