Page:History of the Royal Society.djvu/322

 Turmerick, now seldom used: The Reds are Redwood, Brazil, Mather, Cochineel, Safflowrs, Kermes-berries, and Sanders; the latter of which is seldom used, and the Kermes not often. Unto these Arnotto and young Fustick, making Orange-colours, may be added, as often used in these times.

'In Cloth Dying, wood-soot is of good use.

'Having presented this Catalogue, I come now to give or enlarge the Description and Application of some of the chief of them, beginning with Copperas.

'Copperas is the common thing used to dye Blacks withal, and it is the salt of the Pyrites stone, wherewith old Iron (having been dissolved in it) is incorporated. The filings of Steel, and such small particles of Edge-tools as are worn away upon the Grindstone, commonly called Slippe, is used to the same purpose in Dying of Silks (as we said before) which I conceive to be rather to increase the weight than for any other necessity; the particles of Copperas being not so heavy and crass as these are: for else why should not these latter-named Materials be as well used about Cloth, as other cheaper stuffs?

'We observe, that green Oaken-boards by the affriction of a Saw become black; and that a green sour Apple cut with a knife, becomes likewise black; and that the white grease wherewith Coach-wheels are anointed, becomes likewise black, by reason of the Iron boxes wherewith the Nave is lined, besides the ustulation or affriction between the Nave and the Axel-tree. Moreover we observe, that an Oaken-slick, by a violent affriction upon other wood in a Turning-Lath, makes the same black

Rh