1852 Inst. Mech. Engineers: Proc. 29 June 140 The only source of heat to raise the temperature of the charcoal casing, was the super-heat in the expanded steam in the interior of the cylinder.

1884 Methodist Mag. 787 Solubility is increased by heat, superheat, and pressure.

1903 Engin. Mag. Feb. 756 A superheat of 100° F., or 55° C.

1952 W. J. Fox & S. C. McBirnie Marine Steam Engines & Turbines vii. 137 Modern practice appears to favour the triple-expansion engine with fairly high initial superheat.

2006 S. R. Turns Thermal-Fluid Sci. xii. 958 The addition of superheat is a relatively simple means to improve the basic Rankine cycle efficiency.

1849 Mechanics' Mag. 21 Apr. 368/1 By merely superheating the steam 7 degrees, its elastic force will be raised to 6⅓lbs. to the square inch.

1869 Amer. Jrnl. Sci. 97 12 To subject the oils to a temperature above their boiling points, or in other words, to super-heat their vapors.

1891 Locomotive Engineers' Monthly Jrnl. Oct. 898/1 A smooth boiler, under which a slow, even fire is kept, and from which no steam is used, is in a favorable condition for superheating water, if I may use this term.

1939 H. Carpenter & J. M. Robertson Metals II. xiv. 1194 Marked changes in the structure of cast iron could be produced by superheating the melt, i.e. heating to a temperature considerably higher than that required to melt the metal.

1961 T. K. Derry & T. I. Williams Short Hist. Technol. xi. 317 Great pressure can be generated by superheating water in this way.

1982 Trailer Life Feb. 38/1 Compression super-heats the air and combustion occurs spontaneously—no spark plugs.

1991 Harper's Mag. Nov. (verso front cover) (advt.) We superheat Pontiac's brakes to the very edge of endurance on a 24-mile descent from Pikes Peak.

2001 Day (New London, Connecticut) 4 Dec. a1/3 Online buzz and prattle superheated the Net, as the technogeekocracy chewed endlessly on the possibilities.

1860 Civil Engineer & Architect's Jrnl. 1 Aug. 230/2 Close to the saturation point we find a very high rate of expansion, but this rapidly declines as the steam superheats.

1889 Mechanics 11 148/2 With ether, if initially liquid, evaporation will increase with adiabatic expansion until it all becomes saturated vapor, after which it will superheat.

1952 Proc. Royal Soc. A. 214 405 Garfunkel & Serin..have shown that the middle parts of rods can superheat quite considerably.

1982 Sci. Amer. Dec. 148/1 The sauce superheats at the bottom surface until large bubbles are generated.

2007 Mercury (S. Afr.) (Nexis) 2 July 10 The geyser can explode if the water superheats and the thermostat does not switch off.