. 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 ... . 366 TRACTION ENGINES (Ko Hoael.) No. 397,976 4 Stieeta—Sheet J. r: e. doak, BOAD EHallTE. Patented Feb. 19, 18. (Ho Uodel^ No. 397,976. ^ Sheets—8beet 2. R. R. BOAN. SOAD £N(}IN£. Patentfld Feb. 19, 1889.

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Keywords: ., bo, bookcentury1900, bookdecade1900, bookiddigestofunitedst00alle