Created a semi-automatic key to help prevent the development of telegrapher paralysis, created by the daily abuse of manipulating a manual machine key. Page includes history of the man and the spread of this invention across the United States. www.telegraph-history.org/horace-g-martin
Features backgrounds of early entrepreneurs from early Egyptians, Leonardo da Vinci to modern United Kingdom personalities, such as Alfred Herbert and Axel Wickman. www.pioneers.historians.co.uk
Features transcriptions of diary entries that pertain to the making of his invention, the Shay locamotive engine. Page includes related resource links. www.ephraimshay.com
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