An examination of Dr. Crawford's theory of heat and combustion / by William Morgan.
- William Morgan
- Date:
- 1781
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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![[ «3 ] heat is produced. There atr no experiment* which prove that the percuflion of fteel by flint can caufe fuch a decompofuion in the former as to force away us phlogifton •, nor has Dr. C. ever given us the leaft intimation of this extraordinary phenomenon before he af- fumes it in the prcfcnt folution.—Befides, if the intenfe heat produced by the percuflion of two bodies be owing glfo to fuch a decompo- fition of the air as he mentions j how comes it to pafs that heat is produced by the attrition of two bodies in vacuo ?* Or rather, how comes it to pafs that this inrenfe heat, this very vitri- fication of the metal is produced by the coU lilion of flint and fteel in an exhaujier receiver Another phaenomenon explained by Dr. C, is the acc-’nfion of efientia! oils when mixed with the nitrous acid. Jn this cafe it is faid, || “ thp * Adeoq; in ipfo quoq; <vacu’> attritu mutno corpora i*- caletcunc; uti obiervationibus accuratiflinji* *gregii tiauidbei aperte conftat, quae & more fuo fcglicifiime promovit vir clariflimus, conjun&iflimus collega, Jacobu* Gulielmus Gravefande. Vide Boerhaav. de Igne, Exper*' g. Cor. 3. t See the 4th of Mr. B'yle's Phyfico mechanical Ex- periments touching the fpring of the air.—And the 8th of of his Experiments touching the relation between flame and air. || Page no, ‘‘ phlo-](https://iiif.wellcomecollection.org/image/b21513958_0069.jp2/full/800%2C/0/default.jpg)
