Page:Transactions of the Provincial Medical and Surgical Association, volume 2.djvu/164

 that the proportion of males to females is much less in the Hundred of Kerrier than in the Hundred of Penwith; and the inspection of the Table above mentioned, proves this to be the fact, there being, in the Hundred of Kerrier, 6 females to 5 males; while there is, in Penwith, 8 females to 5 males, the totals being as follows:─

In conclusion, it is abundantly proved by the foregoing calculations, that the natural longevity of the district of the Landsend, is lessened, in a very remarkable degree, by the artificial influence of mining.

It remains to be inquired whether, when this influence is removed, the longevity of the inhabitants, when developed under more favourable circumstances, equals or exceeds that of the other parts of the Kingdom similarly circumstanced.

The means we have of making this last-named inquiry, are to institute a comparison between the data supplied by the parish registers and parliamentary returns, from the parts of the district least subject to the influence of mining, and similar data from other parts of the Kingdom. In doing this, I shall make a somewhat minuter classification of the population than I have attempted in the preceding series of Tables, with the view of obtaining results which are not at all, or very little, liable to be influenced by the artificial causes of disease that exist in the district. I shall, therefore, compare with other parts of the Kingdom, 1st, the 19 agricultural parishes included in the preceding tables; 2nd, a certain