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absorbed acid amount appear arrangement atmosphere becomes bismuth body boiling bulb carbon chemical cold column comparatively conductivity considerable constant contains cooling dark denote density determined dilatation direction effect electricity enclosure energy engine equal evaporation expansion experiments fact Fahr force freezing gases give given glass gravity greater heat hence inches increase instance iron kind known latent heat length less light liquid lower manner means measure melting mercury metals method motion nature nearly necessary observed obtained particles passing plate possible pound pressure probably produced quantity radiation raise rays reflected regard Regnault remains remark represent result rise salt seen shew similar solid solution space specific heat spectrum standard steam substance suppose surface temperature thermometer tube unit vapour various vessel volume weight whole
Page 304 - That the quantity of heat produced by the friction of bodies, whether solid or liquid, is always proportional to the quantity of force expended.
Page 66 - The straight line or distance between the centres of the transverse lines in the two gold plugs in the bronze bar deposited in the Office of the Exchequer shall be the genuine standard of length at 62° F., and if lost it shall be replaced by means of its copies.
Page 66 - May one thousand eight hundred and twenty-five, the Straight Line or Distance between the Centres of the Two Points in the Gold Studs in the Straight Brass Rod, now in the Custody of the Clerk of the House of Commons, whereon the Words and Figures
Page 80 - ... passing from the solid to the liquid, and from the liquid to the gaseous form, or the contrary, occasioning endless vicissitudes of temperature over the globe.
Page 82 - ... thermometer, this will very often be sufficient to produce solidification, if not drop in a small crystal. The mass solidifies at once and the temperature rises very considerably. 112. Laws of Fusion. We may thus sum up our results with the following laws of fusion. (1) A substance begins to melt at a temperature, which is constant for the same substance, if the pressure be constant, and is called the melting-point.