Scientific American May 19, 1906. 424 … of Public Approval Speed increasing device, automatic, G. Baehr 819,707 Speed timing apparatus, A. L. McMurtry.. 820,123 Spinning and twisting machine bands, ma- For Gas and Gasoline Engines chine for making, M. S. Burdette 819,848 Spirometer, J. S. Renvoize 820,259 is the Edison Battery and Spark…
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