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Knight's Mechanical Encyclopedia (ed. Knight) 1 1 Browse Search
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s motion. Tour′ists' In′di-cator. A Waymarker, pe-Dometer, or other instrument for measuring or automatically mapping a route. Tour′ma-line. 1. A prism of schorl used in polarizing apparatus. 2. Rubellite and green tourmaline are used as gems. Tour′na-sin. (Pottery.) A knife for the removal of superfluous slip from the baked ware which has been ornamented by the blowing-pot (which see). Tour′nay. A printed worsted material for furniture upholstery. Tournai in Belgium (Fl. Doormick). Tour′ni-quet. (Surgical.) An instrument for compressing an artery in amputations. The invention of Morelli, 1674, modified by other distinguished surgeons. Also used in compressing aneurisms and tumors. See Fig. 212, page 103. The screw-tourniquet was invented by Petit of France, 1718. The form now in common use, an improvement on that of Petit, was patented by Savigny of London in 1800. Improvements have also been made by Nuck, Verduc, Monro, and other