313240214-Elements-of-Chemistry-Lavoisier_0031.pdf - The Project Gutenberg eBook of Elements of Chemistry by Mr Lavoisier If all the attention has been

313240214-Elements-of-Chemistry-Lavoisier_0031.pdf - The...

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08/08/2015 The Project Gutenberg eBook of Elements of Chemistry, by Mr Lavoisier. 31/229 If all the attention has been paid to this experiment which it deserves, the air will be found diminished in weight exactly equal to what the iron has gained. Having therefore burnt 100 grains of iron, which has acquired an additional weight of 35 grains, the diminution of air will be found exactly 70 cubical inches; and it will be found, in the sequel, that the weight of vital air is pretty nearly half a grain for each cubical inch; so that, in effect, the augmentation of weight in the one exactly coincides with the loss of it in the other. I shall observe here, once for all, that, in every experiment of this kind, the pressure and temperature of the air, both before and after the experiment, must be reduced, by calculation, to a common standard of 10° (54.5°) of the thermometer, and 28 inches of the barometer. Towards the end of this work, the manner of performing this very necessary reduction will be found accurately detailed.
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