in Ugh Northern Latitudes . iO£ 
of warmth. Of the feveral methods of procur¬ 
ing heat, there can be little doubt, that warm 
clothing, and the mutual contact of animal 
bodies, mull be the mod friendly, as being moft 
equable, and not inviting fuch an influx of cold 
air, as is caufed by the burning of an artificial 
fire. And the advantage of fubterraneous lodg¬ 
ings is proved by the well-known fatt, of the 
unchanging temperature of the air at certain 
depths beneath the furface. 
Thefe are the moft material obfervations that 
have occurred to me, on reflecting upon the 
remarkable hiftories and fafts above related. I 
would flatter myfelf that they might aftift in the 
framing of fuch rules and precautions, as would 
render the fuccefs of any future attempts of the 
like kind, lefs precarious. I fhall be happy, if 
they prove acceptable to the Society, to whom 
I have the honour of addrefting them; and ftill 
more, if they in any degree conduce to the wel¬ 
fare of mankind. 
