[381.] Cotton Boll Weigher, about 1930. USNM 283306; 1969. A cylinder, 2½ feet high, for measuring the size of a cotton boll by water displacement. When this device was used in conjunction with the crop meter, the actual fiber yield of a year's crop could be estimated. Gift of Statistical Reporting Service, U. S. Department of Agriculture.
[382.] Viking Garden Tractor, about 1916. USNM 287592; 1969. A garden tractor with a gasoline engine and equipped with cultivator prongs. The operator walked behind the tractor and guided it down the rows. Gift of Woodson High School, Fairfax, Virginia.
[383.] Clam Rake, mid 20th century. USNM 284898; 1969. A small rake, with tines about 10 inches long and a handle of about 2 feet, used by a clam digger on Cape Cod. Gift of Kurt Vonnegut, Jr., West Barnstable, Massachusetts.
[384.] Model of Aultman-Taylor Steam Tractor, 1892. USNM 285053; 1969. This scale model is fully operative and correct in every detail. It is about 3 feet long, 1 foot high, and 6 inches wide. Gift of Mrs. Raymond Stout, Washington, D. C.
Figure 32.—Scale model of Aultman-Taylor steam tractor of 1892. (Catalog No. 384.)
[385.] Maps of U. S. National Forests, 1908. USNM 284897; 1969. Eight maps. Regional maps of forest reserves in the U. S. and territories as of 1908. Transferred from Division of Mechanical and Civil Engineering, National Museum of History and Technology.
[386.] Corn Sheller, late 19th century. USNM 285052; 1969. This factory-made implement is all wood except for the teeth and gears. It could handle only one ear of corn at a time and it was neither shaped properly nor adjustable enough to get the nubbins. Gift of Daniel Gartling, Cockeysville, Maryland.
[387.] Grass Mower, about 1930. USNM 285052; 1969. This mower, manufactured by International Harvester, has a gasoline engine. The cutters are similar to mower and reaper cutter-bars, but there is no protective cover on the cutting mechanism. Gift of Daniel Gartling, Cockeysville, Maryland.
[388.] Spring-Toothed Harrow, early 20th century. USNM 285052; 1969. This was a commonplace implement of its type and period. The steel frame, measuring about 4 feet by 4 feet, was designed to be linked into gangs of harrows, of whatever size desired, and to be pulled by horses or tractors. Made by J. I. Case Company. Gift of Daniel Gartling, Cockeysville, Maryland.