Chemical essays

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printed for J. Dodsley; T. Cadell; T. Evans; T. and J. Merrill, Cambridge; and J. and J. Flecher [sic], Oxford, 1782 - Chemistry
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Page 12 - And he took the calf which they had made, and burnt it in the fire, and ground it to powder, and strawed it upon the water, and made the children of Israel drink of it.
Page 158 - Do not bodies and light act mutually upon one another; that is to say, bodies upon light in emitting, reflecting, refracting and inflecting it, and light upon bodies for heating them and putting their parts into a vibrating motion wherein heat consists?
Page 43 - There are many forts of iron and copper ores which cannot be converted into malleable metals, without much labour, and a great expence of fuel; it is very probable, that by a well-conducted feries of experiments, more compendious ways of working thefe minerals might be found out.
Page 172 - ... its composition, by which it was rendered capable of combustion. This something is, from its most remarkable property, that of rendering a body combustible, properly enough denominated the food of fire, the inflammable principle, the phlogiston. . . . This inflammable principle or phlogiston is not one thing in animals, another in vegetables, another in minerals; it is absolutely the same in them all. This identity of phlogiston may be proved from a variety of decisive experiments ; I will select...
Page 32 - Cornwall, which he calls the mineral fchool, owning that from a teacher, he was there become a learner. He was the author .of many improvements in the manner of working mines, and of fluxing metals; in particular he firft introduced into Cornwall the method...
Page 197 - York/hire, about the year 1664 or before, had piled up in a barn many cart-loads of the pyrites, or brafs-lumps, as they were called by the colliers, for fome fecret purpofes of his own : the roof of the barn happening to be bad, the pyrites were wetted by the rain ; in this ftate they began to fmoke, and prefently took fire} and burned like red-hot coals*. We have an account, in the PhiN 2 lofophical * Power's Microf.
Page 176 - ... them; .... in the instance, however, before us, the reproduction of the original substance will be found complete. " As the inflammable principle cannot be obtained in a palpable form separate from all other bodies, the only method by which we can attempt to unite it with the acid of sulphur must be by presenting to that acid some substance in which it is contained. Charcoal is such a substance; and by distilling powdered charcoal and the acid of sulphur together, we can procure a true yellow...
Page 187 - Mr. Lemery, as far as I have been able to learn, was the firft perfon who illuftrated, by actual experiment, the origin of fubterraneous fires. He mixed twenty-five pounds of powdered fulphur with an equal weight of iron filings ; and having kneaded the mixture together, by means of a little water, into the confiftence of a pafte, he put it into an iron pot, covered it with a cloth, and buried the whole a foot under ground. In about eight or nine hours...
Page 1 - ... eftablifhment of civil focieties, and preceded by many ages, the invention of letters, of hieroglyphics, and of every other mode of tranfmitting to pofterity the memory of paft tranfactions.
Page 168 - ... the support of fire in other bodies : the sulphur from which it was procured was capable of both. There is a remarkable difference, then, between the acid procured from the sulphur and the sulphur itself. The acid cannot be the only constituent part of sulphur: it is evident that something else must have entered into its composition, by which it was rendered capable of combustion.

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