Studies of instruments for measuring radiant energy in absolute value: An absolute thermobile (1916)
National Bureau of Standards · leaf 5
the Bureau of Standards2. CONSTRUCTION OF THE RECEIVERS [Vol. 12 The strip of metal serves three purposes—(i) as a receiver forabsorbing radiant energy, (2) as a source of radiation which canbe produced by heating the strip electrically, and (3) as a standardof radiation to test the galvanometer… … Fig. I.—The radiometer therefore designed so that the receivers could be mounted over thethermopile as shown in Fig. 2. Each receiver, as shown in Fig. 2,is a complete unit consisting of an insulating base of slate B (cutfrom an ordinary writing slate), 3 mm in thickness, to which areattached the…
Measurements and use of instruments · Rays and radiation · Heat flow, thermal and thermodynamic processes
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