liminating any possible effect of furnace gases, and in order todo away with corroding effects of the impurities in the graphite,a black body has been constructed of Marquardt porcelain. Thediaphragms are of thinner walls but similarly arranged, as inthe case of graphite black body. The inner… … Fig. 15.—Curve showing temperature distribution in porcelain black body protecting tubes and are threaded through small holes in the backof the radiator. This type of radiator also furnishes satisfactoryblack-body conditions and is somewhat more convenient to usethan the graphite form, although the…
Thermometry, pyrometry and calorimetry · Heat flow, thermal and thermodynamic processes
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