Constants of spectral radiation of uniformly heated inclosure
A 1914 technical report from the National Bureau of Standards on measuring spectral radiation from a uniformly heated blackbody enclosure, written by government physicists for instrument makers and laboratory researchers. Line drawings give sectioned furnace and bolometer diagrams with hatched walls, dimension marks, lettered parts and a wiring schematic, alongside halftone photographs of laboratory benches; useful for cutaway sections, circuit symbols and measurement scales.
