This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1764 Excerpt: ...formed, is originally a Salt, according to my Meaning of the Word; and Linnaeus is I presume of some such-like Opinion, since in his Syflema Natures he places all precious Stones, even the Diamond itself, in his Classes of Salts. Doctor Woodward likewise, though he speaks not of this crystaline Matter as a Salt, P 4 ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1764 Excerpt: ...formed, is originally a Salt, according to my Meaning of the Word; and Linnaeus is I presume of some such-like Opinion, since in his Syflema Natures he places all precious Stones, even the Diamond itself, in his Classes of Salts. Doctor Woodward likewise, though he speaks not of this crystaline Matter as a Salt, P 4 imputes imputes it to the Properties that Salts have, when he fays, the /hooting of any Metal proceeds generally, merely from Cryjlal, combining with it in the Concoction and Formation of the Mass'. And again, Metalline Matter, when pure andfimple, neater /boots into an angulated Figure, nor is indeed capable of doing that. The Bodies incorporated with Metals, and disposing them to shoot into angulated Figures, are either Sulphur (by which he must mean the Sal Acidum of Sulphur) or Cry jlal. "Iron concreting with Crystal determines it to a rhomboidal Figure, 'Tin to a quadrilateral Pyramid, Lead to a cubic Form. If Crystal be pure it shoots into a fx-fided pyramidal Figure, or into a Pyramid erected upon a Column, each withjfo' Sides and Angles." He moreover supposes, " the Basis of all transparent Gems to be a cryftaline Matter different in Hardness, and coloured by metallic Mixtures: Lead imparts a yellow, Tin-f-a black, Copper a blue or green, Iron a purple, an amethistine, and various Sorts of red. The Figures of all angular opake Fossils are owing to the like crystaline Matter, but in them the metallic Matter ib much exceeds the crystaline, as to render the Body opake."J That f And sometimes a yellow, as several large Grains of Tin in my Prffcffion prove. See Woodward s Fossils, Vol. I, p. 188, and 220. That the Shoots of Crystals are formed in a Fluid strongly charged with crystaline Matter, will readily I believe b..
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