Page:History of the Royal Society.djvu/327

 'Lime or Calke, which is strong Lime, is used to accelerate the fermentation of the Woad, which by the help of the same Pot-ashes and warm liquors kept always so, in three or four Days will come to work like a Kive of Beer, and will have a blue or rather greenish-froth or flowry upon it, answering to the Yest or the Kive. Now the over quantity of Ware, fretting too much upon the Woad, is obtunded or dulled by throwing in Bran sometimes loose, sometimes in Bags.

'The making and using Woad, is one of the most mysterious, nice, and hazardous operations in Dying: It is one of the most lasting colours that is dyed: An intense Woad-Colour is almost black, that is to say, of a Damson-colour; this Colour is the foundation of so many others in its degree, that the Dyers have a certain Scale, or number of Stalls, whereby to compute the lightness and deepness of this Colour.

'Indico is made of a Weed of the same Nature with Woad, but more strong; and whereas Woad is the whole substance of the Herb, Indico is only a mealy concrete juice or fecula dryed in the Sun, sometimes made up in flat Cakes, sometimes into round Balls; there be several sorts of Indico.

'Logwood is chopt and ground like other of the Woods above-mentioned; it maketh a purplish blue; may be used without Allum: It hath been esteemed a most false and fading colour; but now being used with Galls, is far less complained of.

Rh