ABSTRACT
Facilitating instant answers to calculations ranging from the very simple to the highly specialized with equal ease, nomograms were a common calculational aid used in many diverse areas of science and engineering from the 1890s up until the 1960s. Zen’emon Miduno's nomogram for the spectral radiant exitance had been for high temperatures and short wavelengths. Miduno's nomogram could estimate both the spectral radiant and photon exitance. Essentially a printed chart and requiring nothing more than a straightedge to use, nomograms are cheap and extremely easy to use. And while the use of nomograms in modern times has all but disappeared, graphs continue to be found in large numbers. Perhaps the handiest of all nomograms produced for thermal radiation calculations is due to Joseph P. Chernoch. In layout, Chernoch's nomogram consisted of seven parallel scales. Four of the seven scales were for the conversion of temperature between Kelvin, Celsius, Fahrenheit, and Rankine.
