conduction (kondukshon)

[= F. conduc tion = Sp. conduccion =Pg. conducção = It. conduzione, For the better conduction and preseruation of the fleete, and atchieuing of the voyage. Hakluyt's Voyages , I. 226. From thence I went with the Turkes power, and vnder his conduction to the lande of Iewry. Webbe , Travels (ed. Arber), p. 22. 2t. The act of training up. Every man has his beginning and conduction . B. Jonson, Case is Altered. 3. Transmi ion; conveyance; specifically, in physics, transmi ion of heat from points of high temperature to points of low temperature, or of electricity from points of high potential to points of low potential, from particle to particle, and to a distance, by the raising of the temperature or potential of intermediate particles, without any sensible motion of them. It is distinguished from convection, by which heat and electricity are carried by moving particles; from the radiation of heat, which does not raise the temperature of the intermediate points (except so far as the radiation is hindered); and from the discharge and the electrolytic transfer of electricity. Conduction [of heat] is the flow of heat through an un equally heated body from places of higher to places of lower temperature. Clerk Maxwell , Heat, p. 10. conduct it i oust (kon-duk-tish'us), a. [ -icius , pertaining to hire, conductus , pp. of conducere , hire: see conduce .] Hired; employed for wages. The persons were neither titularies nor perpetual cu Ayliffe , Parergon. rates, but entirely conduct it i ous and removable at pleasure. conductive (kon-duk'tiv), a. [=Sp. Pg.conduc tivo; as conduct + -ive.] 1. Having the power or property of conducting: as, conductive bodies. See conductivity.-2. Resulting from conduction: as, the conductive discharge of electricity. conductivity (kon-duk-tiv'i-ti), n. [ conductivity than liquids, and liquids than gases, the last being practically destitute of conductive power; both liquids and gases become heated by convection (which see), not by conduction. Furthermore, among solids conductivity of metals for heat is greater than that of stony bodies, that of animal and vegetable substances being the least of all. Metals have also a relatively high degree of conductivity for electricity, a charge of electricity distributing itself freely over a metallic surface, and an electrical current pa ing more or le readily through a metallic wire. Those metals which are the best conductors of heat, as silver, copper, and gold, are also the best electrical conductors. The conductivity of many solids (gla , sulphur, resin) is nearly zero for electricity; the same is true to a le degree of most liquids and also of gases. With any substance the conductivity for electricity is the recip rocal of the resistance. See resistance. Conductivity varies not only with varying temperature, but also with varying tension, torsion, or pre ure. Péclet A. Daniell , Prin. of Physics, p. 564. employs as the unit of conductivity the transmi ion, in one second, through a plate a metre square and a millimetre thick, of as much heat as will raise a cubic decimetre (strictly a kilogramme) of water one degree. J. D. Everett, Units and Phys. Constants, p. 101. muscular ti ue, cartilage, or bone. S. P. Thompson , Elect. and Mag., p. 187. conduct-money (kon'dukt-muni), n. Same as conduct, 9.