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Correspondence of Scientific Men of the Seventeenth Century ..., Volume 2
Stephen Peter Rigaud,bp. Stephen Jordan Rigaud
Affichage du livre entier - 1841
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Page 294 - Roman vitrioll), but of a nobler virtue than that which is now called by that name ; which vitrioll is not now to be gotten, because, perhaps, they make a greater gain by some such trick as turning iron into copper with it than by selling it. 2. Whether, in Hungary, Sclavonia, Bohemia, near the town Eila, or at the mountains of Bohemia near Silesia, there be rivers whose waters are Impregnated with gold ; perhaps, the gold being dissolved by some corrosive waters like aqua regis, and the solution...
Page 294 - ... of rocks in the mines, and then melting the slimy solution in a strong fire, which in the cooling proves copper. The like is said to be done in other places, which I cannot now remember ; perhaps, too, it may be done in Italy.
Page 294 - ... and if you meet with any transmutations out of their own species into another, (as out of iron into copper, out of any...
Page 390 - For if such an aetherial spirit may be condensed in fermenting or burning bodies, or otherwise coagulated in the pores of the earth and water into some kind of humid active matter for the continual uses of nature, (adhering to the sides of those pores after the manner that vapours condense on the sides of a vessel,) the vast body of the earth, which may be everywhere to the very centre in.
Page 292 - When you come into any fresh company, 1. Observe their humours. 2. Suit your own carriage thereto, by which insinuation you will make their converse more free and open. 3. Let your...
Page 427 - And it appears by experience, as well as by reason, that silver flows from those places where its value is lowest in proportion to gold, as from Spain to all Europe, and from all Europe to the East Indies, China, and Japan; and that gold is most plentiful in those places in which its value is highest in proportion to silver, as in Spain and England.
Page 426 - Silver, and this hath made that Kingdom, which formerly was content with Copper Money, abound of late with Silver, sent thither (I suspect ) for Naval Stores.
Page 313 - Sarum in proposing me a candidate ; and which, I hope, will be further conferred upon me by my election into the Society ; and if so, I shall endeavour to testify my gratitude, by communicating what my poor and solitary endeavours can effect towards the promoting your philosophical designs.
Page 380 - ... it, as might inform me of the manner of the production of those colours, to ground an hypothesis on ; he having given no further insight to it than this, that the colour depended on some certain thickness of the plate ; though what that thickness was at every colour, he confesses, in his Micrography, he had attempted in vain to learn ; and, therefore, seeing I was left to measure it myself, I suppose he will allow me to make use of what I took the pains to find out ; and this I hope may vindicate...