KNAPP'S PATENT LEVER WAGON. ...BE IT KNOWN THAT I, MYLO KNAPP, OF SPRINGWATER, IN THE COUNTY OF LIVINGSTON, AND STATE OF NEW YORK, HAVE INVENTED A NEW AND IMPROVED MODE OF DRAWING WAGONS, SLEIGHS AND SLEDS, BY THE USE OF THAT WHICH IS DENOMINATED "LEVER TONGUE," WHICH IS DESCRIBED AS FOLLOWS: REFERENCE BEING HAD TO THE ANNEXED DRAWINGS OF THE SAME MAKING PART OF THIS SPECIFICATION.| THE NATURE OF MY INVENTION CONSISTS IN TRANSFERRING A PORTION OF THE LOAD TO THE COLLARS OF HORSES, OR THE YOKES OF OXEN..

[np, 1846. Broadside, 9 1/2 x 13", illustrated. Caption title printed in large font, double columns, surrounded by ornate border. Four illustrations of the invention, detailed descriptions of each illustration. Light margin spotting and wear. Small shadow at each blank corner from mounting tape on verso [small hole through one]. Attractive, Very Good.

Knapp's patent was issued in September, 1846. [Journal of the Franklin Institute. Third Series. Vol. XV. Whole No. Vol. XLV. Philadelphia: Franklin Institute. 1848. Page 29.]
OCLC 7645640 [1-SUNY]. Not in Winterthur, Romaine, Eberstadt, Decker, Sabin. (Inventory #: 26217)