Fourcroy

paper, tho, salts and sulphate

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It word(' serve little purpose to go over this long list of papers Though they contributed essentially to tho progress of chemistry, ye they eahlbit but few of those striking discoveries which at once site the face of the science by throwing a flood of light on overythin1 around them. We shall merely notice a few of what wo oonaider hi best papers: 1. Ile ascertained that the moat common biliary calculi are composer of a substance similar to spermaceti. During the removal of the dear Ladies from the burial-ground of the Innocente at Paris, ho discoverer that the bodies were converted into a fatty matter, which lie caller adipocire. It has since been distinguished by the name of c.holostrine and has been shown to possess properties different from those o adipoeire and epermacetL 2. It is to him that we are indebted for the first knowledge of the act, that the salts of magnesia and ammonia have the property of inking together and forming double salts.

3. His dissertation on tho sulphate of mercury contains some good bservations The same remark applies to hie paper on the action ammonia on the sulphate, nitrate, and muriate of mercury. Ile first lescribed the double salts which are formed.

4. The analyses of urine would have been valuable had not almost 11 the facts contained in it been anticipated by a paper of Dr. Wollaston nibliehed in the 'Philosophical Transactions.' It is to him that wo

're indebted for almost all the additions to our knowledge of calculi luce the publication of Scheele 's origins( paper ou the subject.

5. We may mention the process of Fourcroy and Vauquelin for ibtaining pure barytes, by exposing nitrate of barytes to a red heat, is a good one. They discovered the existence of phosphate of magnesia n the bones, of phosphorus in the brain, and in the milts of fishes, and cousiderable quantity of saccharine matter in the bulb of the common mien, which, by undergoing a kind of spontaneous fermoutatiou, was :onverted into manna.

In concluding, we may remark that his friendship, free from all 'elfishness, for Vauquclin, coupled with the well-known fact of his .raving saved the lives of some men of merit, and among others of Dared, tends greatly to acquit Fourcroy of the disgraceful charge which has been made against him of having contributed to the death 3f the illustrious Lavouder. This acquittal is rendered complete by the annexed declaration of Cuvier in his Eloge' of Fourcroy :—" If, in the rigorous researches which we have made, we had found the smallest proof of an atrocity so horrible, no human power could have induced us to sully our mouths with his Elage, or to have pronounced it within tho walls of tide temple, which ought to be no lees sacred to honour than to genius."

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