WHEEL n.
Letter. (b) A kind of gunlock in which sparks were struck from a flint, or piece of iron pyrites, by a revolving wheel. (c) A kind of brake a carriage. -- Wheel ore (Min.), a variety of bournonite so named from the shape of its twin crystals. See Bournonite. -- Wheel pit (Steam Engine), a pit in the ground, in which…
WHITE a.
silvery-white cast iron containing a large proportion of combined carbon. -- White iron pyrites (Min.), marcasite. -- White land, a tough clayey soil, of a whitish hue when dry, but blackish after rain. [Eng.] -- White lark (Zoöl.), the snow bunting. -- White lead. (a) A carbonate of lead much used in painting, and…
YELLOW a.
n; -- called also copiapite. -- Yellow copper ore, a sulphide of copper and iron; copper pyrites. See Chalcopyrite. -- Yellow cress (Bot.), a yellow-flowered, cruciferous plant (Barbarea præcox), sometimes grown as a salad plant. -- Yellow dock. (Bot.) See the Note under Dock. -- Yellow earth, a yellowish clay, col…