A TRADE SECRET OF 1896
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A TRADE SECRET OF 1896 book
THOMAS ARMAT still had his improved projecting machine in the basement at the real estate office of Daniel & Armat in Washington. He was biding his time, yet hopeful.
Armat learned that C. H. Kayser's struggles with the Edison attempt at projection in the offices of Raff & Gammon in New York had not attained a success.