Amazon.com: Customer reviews: Heat-Treatment of Steel: A Comprehensive Treatise on the Hardening, Tempering, Annealing and Casehardening of Various Kinds of Steel: Including High-speed, ... Furnaces and on Hardness Testing
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originally published by Erik Oberg by The Industrial Press, 1914
the copy i read was obtained from Goo-Gal (you know who) research, and freely off-loaded from the information super roadblock (pease excuse the goofy writing to avoid filtration on the am-a zone)
old books like this, from the turn of the century and before, are full of valuable historical insights into the development of a given industry
the reader should be warned that the language used is sometimes old-fashioned, confounding as all tarnation, and may require difficult translation (not all archaic terms are well defined anywhere on the weber verse) or even informed guesswork to understand
also, procedures described in these older works are often of an industrial nature bearing little resemblance to any DIY situation, and are sometimes outdated or simply not true (ex. : talk to someone about "packing" steel in a forge with a hammer and report back to me about the results : a complete loss of credibility is my prediction)
sometimes great for theory but the information should be viewed with a healthy dose of skepticism until it can be verified independently