An examination of Dr. Crawford's theory of heat and combustion / by William Morgan.

  • William Morgan
Date:
1781
Catalogue details

Licence: Public Domain Mark

Credit: An examination of Dr. Crawford's theory of heat and combustion / by William Morgan. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    [ ] maining 13,390 degrees I know noc : For neither the water % nor the veffcl Teem to have imbibed any part of it, if we are allowed to judge by the thermometer or our fenfes. i __ « . f In applying the folution of thofe artificial earthquakes to that of the real ones. Dr. C. fuppofes a fimilar mixture of fulphureous and metallic bodies to be produced in the bowels of tlie earth, and that thofe bodies, in confequence of fome changes which take place there, are brought into contaft with the water and at- mofpherical air which are difFufed through the earth’s fubftance, or lodged in cavities be- lt In making this Experiment I have placed a fmall bafoa under the mouth of the jar after mixing the nitrous and common air, and irftantly taken the whole out of the tubt By which means if any heat were communicated to the water, it would be eafily determined from the fniail quantity in which the mouth of the jar is now immerfed The jar iu which this Experiment was made contained about 3 ounce meafures of air. Had a larger been ufed, it is probable the heat would have been more confiderabie. But this by no means removes the objedtioq to Dr. C.’s fyftem. For (independent of the fmall quantity of air which muft be fuppofed to be phlogifticated, according to his hypothefis, in the collifion of flint and fteel, where fuch powerful effedts are produced) even if the thermometer were raifed ioo°, it would dill be difficult to account for the remaining 13,300° which are faid to be diffipated ky this phlogifticaticnof the airv neath
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