The Cambridge Scientific Instrument Co., LTD. · Cambridge University Press · leaf 19
d was in a position to say that at the hardening point one degree Centigrade made a perceptible difference in the hardened steel. Recent work showed that hardening should be far more accurate than was considered necessary a few years ago. Five degrees Centigrade made the difference between good and… … Vanadium Steel," by Captain H. Riall Sankey & T. Kent Smith. Proceedings of the Institution Fig. 5. of Mechanical Engineers, Dec. 1904. Brayshaw's steel-hardening furnace, showing the thermometer Dust-DestrUCtorS. The efficiency of and temperature indicator in use. a dust-destructor depends so…
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
