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Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
e to the type. As to proportions, it may be standard, extended, compressed, heavy, light, etc. 11. The edge of a cutting instrument. Face-ham′mer. One with a flat face, as distinct from one having pointed or edged peens. Face-guard. A mask with windows for the eyes, adapted to the use of persons exposed to great heat, as in glass-houses, forging heavy works, and in the various metallurgic furnace operations. Also for workmen exposed to flying particles of metal or stone. Cohn, an oculist of Breslau, made an estimate of the number of workmen in metal who had been injured by flying pieces, and found that among 1,283 workmen, 90 per cent had suffered to some extent; 40 per cent had been under medical treatment; 59 were permanently injured; 21 had lost one eye. He introduced mica spectacles. Face-joint. That joint of a voussoir which appears on the face of the arch. Face-piece. （Shipbuilding.) A piece of wood wrought on the forepart of the knee of the he
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
66. Fceling encouraged:— Bought me two new pair of spectacles of Turlington, who, it seems, is famous for them. —Pepys' Diary, 1667. The residents in Sikkim [says Hooker], in the Himalayas, seek protection for their eyes from the glare of the newly fallen snow, some with veils, others with shades of brown paper, or of hair from the yaks' tails, whilst a few have spectacles of woven hair; and the Lepchas loosened their pigtails, and combed their long hair over their eyes and faces. Cohn, an oculist of Breslau, has made an estimate of the number of workmen in metal who have been injured in the eye by minute pieces of metal. Among 1,283 workmen, he found that 90 per cent had suffered thus to some extent, and 40 per cent had been under medical treatment therefor; 59 were permanently injured, and 21 had lost the use of one eye. He introduced mica spectacles with great success. The frame is made to fit around the eye, like goggles. Spec-trom′e-ter. （Optics.) An instrum