| Crocidolite. | Hawk’s-eye. | Tiger-eye. | |
| Silica | 51.89 | 93.45 | 93.05 |
| Ferric oxide | 19.22 | 2.41 | 4.94 |
| Alumina | · · | 0.23 | 0.66 |
| Ferrous oxide | 17.53 | 1.43 | · · |
| Magnesia | 2.43 | 0.22 | 0.26 |
| Lime | 0.40 | 0.13 | 0.44 |
| Soda | 7.71 | · · | · · |
| Potash | 0.15 | · · | · · |
| Water | 2.36 | 0.82 | 0.76 |
| Total | 101.69 | 98.69 | 100.11 |
Another alteration product of the crocidolite, consisting of silica and ferric hydrate, has been called griqualandite. Crocidolite and the minerals resulting from its alteration occur in seams, associated with magnetite and other iron-ores, in the jasper-slates of the Asbestos Mountains in Griqualand West, Cape Colony. It is known also from a few other localities, but only in subordinate quantity. (See [Cat’s-Eye].)
CROCKET (Ital. uncinetti, Fr. crochet, crosse, Ger. Häklein, Knollen), in architecture, an ornament running up the sides of gablets, hood-moulds, pinnacles, spires; generally a winding stem like a creeping plant, with flowers or leaves projecting at intervals, and terminating in a finial.
CROCKETT, DAVID (1786-1836), American frontiersman, was born in Greene county, Tennessee, on the 17th of August 1786. His education was obtained chiefly in the rough school of experience in the Tennessee backwoods, where he acquired a wide reputation as a hunter, trapper and marksman. In 1813-1814 he served in the Creek War under Andrew Jackson, and subsequently became a colonel in the Tennessee militia. In 1821-1824 he was a member of the state legislature, having won his election not by political speeches but by telling stories. In 1827 he was elected to the national House of Representatives as a Jackson Democrat, and was re-elected in 1829. At Washington his shrewdness, eccentric manners and peculiar wit made him a conspicuous figure, but he was too independent to be a supporter of all Jackson’s measures, and his opposition to the president’s Indian policy led to administration influences being turned against him with the result that he was defeated for re-election in 1831. He was again elected in 1833, but in 1835 lost his seat a second time, being then a vigorous opponent of many distinctively Jacksonian measures. Discouraged and disgusted, he left his native state, and emigrated to Texas, then engaged in its struggle for independence. There he lost his life as one of the defenders of the Alamo at San Antonio on the 6th of March 1836.
A so-called “autobiography,” which he very probably dictated or at least authorized, was published in Philadelphia in 1834; a work purporting to be a continuation of this autobiography and entitled Colonel Crockett’s Exploits and Adventures in Texas (Philadelphia, 1836) is undoubtedly spurious. These two works were subsequently combined in a single volume, of which there have been several editions. Numerous popular biographies have been written, the best by E. S. Ellis (Philadelphia, 1884).
CROCKETT, SAMUEL RUTHERFORD (1860- ), Scottish novelist, was born at Duchrae, Galloway, on the 24th of September 1860, the son of a Galloway farmer. He was brought up on a Galloway farm, and graduated from Edinburgh University in 1879. After some years of travel he became in 1886 minister of Penicuik, but eventually abandoned the Free Church ministry for novel-writing. The success of Mr J. M. Barrie had created a demand for stories in the Scottish dialect when Mr Crockett published his successful story of The Stickit Minister in 1893. It was followed by a rapidly produced series of popular novels dealing often with the past history of Scotland, or with his native Galloway. Such are The Raiders, The Lilac Sun-bonnet and Mad Sir Uchtred in 1894; The Men of the Moss Hags in 1895; Cleg Kelly and The Grey Man in 1896; The Surprising Adventures of Sir Toady Lion (1897); The Red Axe (1898); Kit Kennedy (1899); Joan of the Sword Hand and Little Anna Mark in 1900; Flower o’ the Corn (1902); Red Cap Tales (1904), &c.