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Scientific American, Vol. 91, No. 12 (1904) (1904)
leaf 17
SEPTEMBER 17, 1904. … ; Designs, ATTIOIG? - ss, 04's Preiss ie sists ate, ofelelerinsg ase aiee bs 769,332 Valve, pop safety, . 769,512 Copyrights, Ete. Valve, puppet, H. 769,382 Anyone sending a sketch and description may Valve operating mechanism, E. E. Arnold.. 769,373 quickly ascertain our opinion free whether an…Internet Archive · Public domain (published before 1931). Free to use for anything.
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