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Radiant Heat Source, Low Voltage (P-2510) The 12 V, 100 W heating coil wound on ceramic plate and is assembled between two insulated plates with aperture and two 4 mm sockets. Complete assembly is mounted on 150 x 8 mm rod.
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Crooke’s Radiometer (P-2520) Partly evacuated glass bulb 65 mm diameter containing a set of 4 mica vanes mounted on a pivot, one side of each vane blackened and reverse side is kept bright. When exposed to sunlight or bright lamp, the rotor rotates rapidly. Mounted on stand.
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Leslie Cube (P-2525) Sheet metal cube 125 mm side. The four faces of box are dull black, bright black, white and bright with opening at top.
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Thermoscope Ether (P-2535) To detect heat radiation, made of glass with bulbs approx. 30 mm, diameter, one bulb painted matt black, partially filled with ether.
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Thermopile, Copper-Constantan (P-2550) It consists of 12 pairs of Bismuth and Antimony bars joined together in series with insulation between them. The couples thus arranged are enclosed in a brass frame having two terminals connected to the Bismuth and Antimony poles. Complete with nickel plated brass cone and mounted on an adjustable stand.
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