Toolmaker51, PJs,and C-Bag,
Thank you for the link and information about the "Digital Public Library of America". I used Wikipedia for the Cliff Notes background on https://dp.la/ . Looks like they have the right intentions and another source of information. Just for a test, I searched on the word "metal Lathe" and a few references were from 1940's to 1960's, no surprise there, and then "8080 microprocessor", with references centered on 1975, as expected, and then "steam engine", and bingo the mother lode of hits from 1629 to today, with the majority from mid-19th century to early 20th century (e.g., year 1900 with 90 items). I will add this to my list of websites for research the old fashion way before Google invented Google search. Thank you for the information.
Paul

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