A dictionary of terms used in medicine and the collateral sciences / by Richard D. Hoblyn.

  • Richard Hoblyn
Date:
1858
Catalogue details

Licence: Public Domain Mark

Credit: A dictionary of terms used in medicine and the collateral sciences / by Richard D. Hoblyn. Source: Wellcome Collection.

    673/692 (page 645)
    VI'TRIOL {viti-um, glass). A term originally applied to ani/ crys- talline body possessing a certain degree of transparency, but now re- stricted to the following substances :— 1. Gree?i vilriul. Copperas, or sulphate of iron. When the salt is exposed to heat in a retort, it first gives off water of crystallization, or plihym of vitriol; next cornea an acid, called sjoini of vitriol; then a stronger acid, called oil of vitriol; the latter part of this becomes solid, and has been called iiluciul oil of vitriol. 2. Blue vilriol. Sulphate of copper, commonly called Roman vitriol. 3. White vitriol. Sulphate of zinc. VITRUM. Glass. This term is also applied to certain^/tissy sub- stances, viz. 1. Vitnim antimonii. Glass of antimony ; a reddish-brown coloured glass, obtained by first calcining antimony, and then fusing it in a crucible. It is medicinally employed in preparing the antimonium tartarizatum. 2. Vitrum aniimonii ceratum. Cerated glass of antimony, or the vitrified oxide of antimony with wax. VITTA. Literally, a riband. A term applied to the vessels of oil found in the coat of the fruit of Umbelliferous plants. They afford an instance of the luind, propria, or receptacles of secretion. VITTIE-VAYR. The Indian name of the fibrous root of the An- dropogon muricatiis. See Cuscus. VIVI'PAKOUS (vivus, alive, pario, to bring forth). A term ap- plied to animals which bring forth their young alive and perfect, as distinguished from oviparous animals, which produce their young in the egg- yiVISE'CTION {vivus, alive, seco, to cut). Dissection of living animals, for the purposes of experiment. VOCAL LIGAMENTS. Vocal cords. A name given to the thyro- arytenoid articulation. VOLATI'LIT Y (volatilis, from 7)oZo, to fly). A property of bodies, by wliich they are disposed to assume the state of vapour, and fit/ off. VOLfA, PILE OP. An apparatus consisting of ])l,atcs of zinc, and silver, and pieces of moistened woollen cloth, piled in the order of zinc, silver, cloth; zinc, silver, cloth ; for twenty or more repetitions. See Galvanism. Volta-meter. A cell of decomposition, containing dilute sulphuric acid, and so formed as to admit of the evolved gases being collected and measured. VO'LTAISM. Voltaic electricity; chemical electricity. See GaZ- vanism. yO'LUBLE (vclnbilis, rolling). Twisting; as applied to stems ^yhlch twist round other bodies, the hop to the right, the bindweed to the left. VOLUME (volumen, from volvn. to roll). The apparent space which a body occui)ies is called its volume; the effective space whicli the same body occupies, or its real bulk of matter, is its mass ; the relation ot the mass to the volume (or the quotient of the one by the other) is Its densiti/; and the empty spaces, or voids, which render the volume larger than the mass, are its pores. Definite Volumes. Tlie union of gases is always effected in simple proportions of their volumes: a volume of one gas combines with an