thermodynamics

pl. Physics: The science which treats of the relations subsisting between heat and work. Thermo - electric alarm : An apparatus designed to indicate the rise of temperature in bearings for shaftings, or in any kind of machinery or any branch of manufacture where a fixed temperature is desirable. Thermo-electric battery: Elect .: A battery in which an electric current is established by applying heat or cold. Thermo - electric current : Thermo-electric force : The electromotive force of a thermo-electric circuit. ( Everett : The C. G. S. Sys tem of Units, ch. xi., p. 74.) Thermo - electric pile: Elect.: A number of metallic plates of two different metals coupled in series, so that the whole of one set of the alternate junctions are at one side and the other set on the other. Antimony and bismuth are preferred as being farthest apart of the metals ranged in thermo-electric order. By heating one set of the junctions, electricity is developed. In practice, the face of the pile, which contains one set of junctions, is turned toward the source of heat, such as a polarized beam from an electric lantern; then, a galvanometer being placed in the circuit of the pile and equilibrated, any increase or diminution of the temperature in the beam is at once shown by movement of the galva no meter needle. Thermo- electric series: Electric.: Metals arranged in the order of their capacity to generate a thermo-electric current when heated. IMG:content-0999.png:[blocks in formation] Elect.: Electricity excited by application of heat to any suitable apparatus, usually the junction between two different metals. The discovery that it may be thus produced was made by Profe or Seebeck, of Berlin, in 1821. thermo-electrometer, subst . An instrument for ascertaining the heating power of an electric current, or for determining the strength of a current by the heat it produces. thermo-element, s . Electric.: An element which aids in producing ther-mo-, therm-, pref. [Gr. thermos =hot.] A thermo-electricity. prefix used in a number of compound words refer ring to heat or temperature.