by Office of Exhibits, Smithsonian Institution.

178. Check Row Corn Planter, about 1870. USNM 230441; 1959. This machine
planted two rows at a time and required two men to operate. One man
drove the horses and the other operated a lever for dropping the corn at
the point desired. Patents for "check" row planters were issued in 1853,
1855, and 1857. Gift of Clayton Kanter, New Knoxville, Ohio.

179. One-Row Hand "Corn Jobber," mid 19th century. USNM 230441; 1959.
Seed corn is released by means of a lever. Gift of Clayton Kanter, New
Knoxville, Ohio.

180. Wide Single-Shovel Plow, about 1840. USNM 230574; 1959. Farmers in
the western part of the United States in the 1840s used this type of
plow to cultivate corn. Gift of John Offenbacker, Sidney, Ohio.

[Illustration: Figure 17.--Double-shovel plow. (Catalog No. 181.)]

181. Double-Shovel Plow, about 1850. USNM 230574; 1959. This plow, with
shovels placed in a staggered position, was commonly used for
cross-plowing or cultivating. Gift of John Offenbacker, Sidney, Ohio.

182. Double-Shovel Plow, about 1850. USNM 230574; 1959. This
double-shovel plow has the shovels placed opposite one another. Gift of
John Offenbacker, Sidney, Ohio.

183. A-Frame Harrow, mid 19th century. USNM 230574; 1959. This
triangular harrow has wooden beams with 22 ten-inch iron spikes driven
through them. This type of harrow pulverized and leveled plowed land,
covered the seed, and cultivated between rows of corn. Triangular
harrows worked better than square types because the triangles had
greater strength on newly cleared land. Gift of John Offenbacker,
Sidney, Ohio.

184. Trolley Carrier for Hayfork, about 1875. USNM 230574; 1959. This
steel trolley carrier supported a one-horse hayfork. A pulley attached
to the trolley carrier lifted and lowered the hayfork. The first trolley
carriers for hayforks were invented by J. E. Porter of Ottawa, Illinois,
in 1869 and 1872. They were made of wood and iron. The first steel
carriers were patented by Jacob Ney, Canton, Ohio, and (in 1886) by P.
A. Myer, Ashland, Ohio. Gift of John Offenbacker, Sidney, Ohio.

185. Riding Disk Cultivator, late 19th century. USNM 230574; 1959. This
cultivator has two sections, each with three 15-inch disk wheels spaced
5-3/4 inches apart. It has handgrip levers for making cutting
adjustments. This machine worked best on ground between row crops. Gift
of John Offenbacker, Sidney, Ohio.

186. Singletree, late 19th a