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ride of calcium and magnesium occurring in yellowish masses which rapidly deliquesce upon exposure. It is found in the salt mines at Stassfurt.

A brown color imparted to the skin by exposure to the sun; as, hands covered with tan. Tan bed (Hort.), a bed made of tan; a bark bed. -- Tan pickle, the liquor used in tanning leather. -- Tan spud, a spud used in stripping bark for tan from trees. -- Tan stove. See Bark stove, under Bark. -- Tan vat, a vat in whic…

A neurosis caused by exposure to heat.

The state of being tried or tempted; exposure to suffering that tests strength, patience, faith, or the like; affliction or temptation that exercises and proves the graces or virtues of men. Others had trial of cruel mockings and scourgings. Heb. xi. 36.

ir by that which is pure, in any inclosed place, as a house, a church, a mine, etc.; free exposure to air. Insuring, for the laboring man, better ventilation. F. W. Robertson.

A hydrous phosphate of iron of a blue to green color, growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.

To expose to the air; to air; to season by exposure to air. [An eagle] soaring through his wide empire of the air To weather his broad sails. Spenser. This gear lacks weathering. Latimer.

Beaten or harassed by the weather; worn by exposure to the weather, especially to severe weather. Shak.

Eaten into, defaced, or worn, by exposure to the weather. Coleridge.

Having the surface altered in color, texture, or composition, or the edges rounded off by exposure to the elements.

Worn by the action of, or by exposure to, the weather.

he film used in such plates is of collodion impregnated with bromides and iodides. Before exposure the plate is immersed in a solution of silver nitrate, and immediately after exposure it is developed and fixed.

To kill by the cold, or exposure to the inclemency of winter; as, the wheat was winterkilled. [U. S.]

A derivative of xylene obtained as a white crystalline substance which on exposure in the air becomes red; -- called also betaorcin.

nsparent, poisonous liquid, composed of zinc and ethyl, which takes fire spontaneously on exposure to the atmosphere. -- Zinc green, a green pigment consisting of zinc and cobalt oxides; -- called also Rinmann's green. -- Zinc methyl (Chem.), a colorless mobile liquid Zn(CH3)2, produced by the action of methyl iodide…