(Encyclopedia) ammonium sulfate, chemical compound, (NH4)2SO4, a colorless-to-gray, rhombohedral crystalline substance that occurs in nature as the mineral mascagnite. It is soluble in water and…
(Encyclopedia) fulminatefulminatefŭlˈmĭnāt [key], any salt of fulminic acid, HONC, a highly unstable compound known only in solution. The term is most commonly applied to the explosive mercury (II)…
(Encyclopedia) patinapatinapătˈənə [key], coating of carbonate of copper on articles of copper or bronze, formed after long exposure to a moist atmosphere or burial in the earth. Although commonly…
(Encyclopedia) cerussitecerussitesērˈəsīt [key], colorless to white or gray mineral, sometimes yellowish or greenish, transparent to opaque, very brittle, crystallizing in the orthorhombic system and…
(Encyclopedia) White, Stewart Edward, 1873–1946, American author, b. Grand Rapids, Mich., grad. Univ. of Michigan, 1895. The stories collected in The Claim Jumpers (1901) and The Blazed Trail (1902)…
(Encyclopedia) Valle, Pietro dellaValle, Pietro dellapyĕˈtrō dĕlˈlä välˈlā [key], 1586–1652, Italian traveler in Asia. He sailed (1614) from Venice; spent a year in Constantinople, where he studied…
(Encyclopedia) dogfish, name for a number of small sharks of several different families. Best known are the spiny dogfishes (family Squalidae) and the smooth dogfishes (family Triakidae). Spiny…
(Encyclopedia) mimic thrush, common name for members of the Mimidae, a family of exclusively American birds, allied to the wrens and thrushes, that includes the mockingbird, the catbird, and the…
Read about some of the most significant riots in U.S. history 1898: Wilmington, North Carolina While Democrats held power at the state level in North Carolina, a coalition of white…
(Encyclopedia) ambergrisambergrisămˈbərgrēs [key], waxlike substance originating as a morbid concretion in the intestine of the sperm whale. Lighter than water, it is found floating on tropical seas…
