Heat treatment of high-temperature mercurial thermometers
A technical report on the heat treatment of high-temperature mercurial thermometers, issued by the National Bureau of Standards in 1906 for instrument makers and laboratory physicists. Line-engraved plates pair dense grids of plotted drift curves, labelled by thermometer number and temperature, with mechanical diagrams: a dial of radiating degree marks and a sectioned furnace tube keyed to lettered parts.
