- Part of The Phenomena and Laws of Heat
Engraved plate illustrates an echelon lens, often used in lighthouses. Constructed in several layers, the central lens is extended in a series of annular rings. The thick glass absorbs less heat and light than lenses of…
Frontismatter and select illustrations have been digitized from this work on the laws of heat.
A: Bulb containing mercury attached to a glass tube of narrow diameter. Thermometer has Celsius scale with 20-30 degree range with major divisions every 1 degree and minor divisions every 0.1 degree.
A: Bulb containing mercury attached to a glass tube of narrow diameter. Thermometer has Celsius scale with 0-100 degree range.
B: Protective cardboard tube for the thermometer (not digitized).
Fig. 1 represents an air thermometer, or the expansion of air by heat.
Fig. 2 is the logarithmic curve.
Fig. 3 is a device suggested by "Mr. Ewart," to illustrate Dalton's idea on the temperature of the atmosphere.
Fig. 1 is intended to illustrate Dalton's ideas on the subject of the capacities of bodies for heat.
Fig. 2 is a comparative view of the old and new divisions of the scale of the mercurial thermometer.
FIg. 3 is a…
General view of instrument journeyman Harry Beamish inserting an element into a Foxboro recording thermometer in the Dow Chemical Company's Instrument Department. Established in 1926, the Instrument Department was…