Correspondence of Scientific Men of the Seventeenth Century: Including Letters of Barrow, Flamsteed, Wallis, and Newton, Printed from the Originals in the Collection of the Right Honourable the Earl of Macclesfield, 第 2 巻


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294 ページ - 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...
293 ページ - ... in silence, and with a jest, though with some dishonour, than to endeavour revenge ; for, in the first case, your credit's ne'er the worse when you return into England, or come into other company that have not heard of the quarrell.
294 ページ - ... 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.
294 ページ - ... and if you meet with any transmutations out of their own species into another, (as out of iron into copper, out of any...
390 ページ - 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.
292 ページ - 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...
427 ページ - 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.
426 ページ - 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.
380 ページ - ... 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...
292 ページ - You will find little or no advantage in seeming wiser, or much more ignorant than your company. 4. Seldom discommend any thing though never so bad, or do it but moderately lest you be unexpectedly forced to an unhandsome retraction.