Atmosphere : a philosophical work / by George Woodhead.

  • Woodhead, George.
Date:
1852
Catalogue details

Licence: Public Domain Mark

Credit: Atmosphere : a philosophical work / by George Woodhead. Source: Wellcome Collection.

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    hours and a half), and the degree of heat obtained (boiling heat), it is possible that some portion of the heat might be caused by the action of that part of the machinery which was out of the water, and commu- nicated thence to the water. The boring of cannon, however, is an operation re- quiring great force; being effected by shaviiig or cutting the iron; and possibly the heat might arise whoUy from the com- pression of the air caused by cutting the iron. Prom this kind of heat, that emi- nent philosopher. Dr. Black, might con- ceive his theory of latent heat. He sup- posed the existence of something in bodies which, under some circumstances, was evolved or set free, and produced the effects ascribed to heat, which he called latent heat. The heat in many, if not in all cases of spontaneous combustion, seems to arise from the compression of air; the compres- sion being effected by subsidence, and the contractile and accretive properties of the substances.
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