Bpok VI.

Of EARTHS.

As to the Preparation of Stones or Earths,that is done ordinarily two Ways, that is tofay, by grinding on a Porphyry or Marble, inlike Manner as Sea Shells, Pearl, Hyacinth,Topazes, Emeralds, Sapphirs, Corals, Load-ftone, Lapis Calaminaris, Tutty, and thelike, are ground. The fecond Way is bypounding in a Mortar with Water, in orderto reduce them to a fine Powder, as we doLytharge, Cerufe, and Minium. The firft,after they have been levigated, are made in-to Troches with R.ofe Water, and the nextinto Tablets with common Water.

Terra Perfica, or Indian t\ed, isLemery. a dry red Earth that is broughtus in little Stones that are of amoderate Hardnefs; the Shoe-makers life'em to dye Shoe-heels red; chufe the deepeftcolour'd. Terra Sapnaria, in French Stuefiin,or Fullers Earth, is a Kind of flippery gluti-nous Earth, that is heavy, of a yellow orblackifh Colour, and does the fame Thingas Soap, whence it was call'd Soap Earth,or the Earth the Fullers ufe to fcour with.The Terra Selinufia is a greafy or clayeyEarth, that is very like that of Chio i it isaftringent and refolutive, proper tc take awaySpots and Chops of the Skin, to foften Tu-mours of the Breaft and Tefticles, and to re-folve. The Chio Earth is a Kind of feal'dBarth, or a fatty, fticky, aQi-colour'd Earththat is brought from Chio; it is aftringent,

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and removes Spots, &c. Terra Samia, orSamian Earth, is what comes from the Ifleof Samos, and is of two Kinds ; one is foft,white, and crumbling, that (ticks to theTongue when apply'd to it, and is very likefeal'd Earth. Some People call it Collyrium,becaufe it ferves fometimes to relieve theEyes; the other is crufty and hard, the'fometiiing unctuous , they call this SamiutAfter, becaufe it is found in fhining Spangles,like Stars.

Befides there is Marga, Lithomarga, Ste-ttomarga , Medulla Saxorum , Agarkus Mine-rails, Lac Luna, or Stoyie Pith, Mineral A-garick., Moon Milk, which is a Kind offoft, friable, pithy, very white Stone, re-fernbling Chalk, which is found in the Cleftsof Rocks in fome Parts of Germany • it isdeterfive, aftringent, drying, confolidating,which diffolves coagulated Blood, and maybe us'd inwardly and outwardly.

Mr. Pomet obferves in his Annotationsmade at the End of his Book, that thisStone Pith is found on the Side of the Sjg-niory of Mofcorv, belonging to the Electorof Saxony, and near Gironne in Catalonia jthat the Inhabitants of thole Parts chufe fomeof this Earth after the Sun is down and haswarm'd it, that has little Balls on it likeMeal, with which they make Bread, mixingit with fome true Flower, which has beepconfirm'd by feveral other Naturdifts.

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