. Digest of United States automobile patents from 1789 to July 1, 1899, including all patents officially classed as traction-engines for the same period. Chronologically arranged ... together with lists of patents in the classes of portable-engines, traction-wheels, electric locomotivs, and electric railway battery systems ... . *^vitvica<j«^ o^^^-^ No. 447,978, 0 Sbeets—Sbeet fi. G. G. SCHROEDER. THACTION ENGINE. Patented Mar. 10, 1891. J^; No. 451,648. 3 Sheets—Sheet I. N. L. DARLING. TEAGTIOH ENGINE. Patented May 5,

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Keywords: ., bo, bookcentury1900, bookdecade1900, bookiddigestofunitedst00alle