Page:Willich, A. F. M. - The Domestic Encyclopædia (Vol. 2, 1802).djvu/151

131&#93; b i a i) i a • of bursting, This mal i tsioni 1 by turning n into rink pasture, or f- i with wa }. When ought to be driven, or moved about briskly, and then properly purged. Should this treatment not relieve i, blood-letting in the tail will be necessary j after which the top of an egg should be broken off*, and tfficient quantity of the white il out to admit the powder of a nutmeg. These ingredients are to be well mixed, and the whole, with the shell, forced down the throat of the animal,
 * h should then be gently walk-

ed about ; and thus it will speedily recover. DIAMOND, a genus of sili- hs, and the hardest of all the stones hitherto discovered : it is in general transparent, but is
 * times found of a rose-colour,

n, blue, yellow, ek. The most valuable diamonds are those of a complexion similar to f a drop of water : their price also increases in proportion to the regularity of their form, and ac- cordingly as they are free from spots, stains, flaws, specks, and cross veins. Diamonds are found chiefly in India and South Ame- rica, whence they are brought to Europe in a rough state, in the form of roundish pebbles with shining surfaces. There is, how- ever, a kind of diamonds, which are but little esteemed, found in various parts of Europe, and also in this country, in the county of Cornwall, where they are called Cornish, diamonds. These may, with more propriety, be termed lis : they are found in digging the tin-mi ne* of Cornwall, and are, '■•Jit an'l clear, excepj irds the root, when- the coarse, an I • olour. It is remarkable that genuine diamonds, when exposed to the rays of the sun, attva t light which they again emit, and appear lu- minous, in the dark. The largest jewel of this description, in the world, is at present in the royal treasury of Portugal : it is of an Oval figure, measures about 4 inches by 3, weighs l6SO carats, or 12' ounces, and is valued at 224 mil- lions sterling. Independently of the purposes to which the diamond is subser- vient as an ornament, especially in the dress of females, the smaller particles of it have, since the lfith century, been employed for cutting glass ; and, when reduced to an impalpable powder, are very useful for polishing ether precious stones, as well as for engraving on those which possess an inferior degree of hardness. For the valuation of diamonds of ail weights, Mr. D. Jefferies, an ingenious jeweller, who pub- lished a treatise oil diamonds and pearls, several years since, lays down the following rule : He first supposes the value of a rough diamond to be settled at 21. per carat, at a medium j then, to find the value of diamonds of greater weight, he directs to multiply die square of their weight by 2, and the product is the value required. On this principle, Mr. Jeffekies has constructed tables of the price of diamonds from 1 to 1000 carats, which the curious reader will rind in the work before mentioned, of which a new edition appeared a fe-sr years since, in 8vo. price 12s. DIARRHOEA, or Looseness, is a frequent and copious evacua- tion of liquid excrement by stool. K 2 This