14. Model of Ten Eyck Grain Harvester, 1825. USNM 46812; 1906. Model is made of wood and iron, 15 inches by 8 inches. Long knives on a drum were rotated by belt shaft on traveling wheels. Long projecting points gathered the straw. Iron shafts at the rear allowed animals to be harnessed to push the machine. James Ten Eyck patented the harvester on November 2, 1825. Gift of United States Department of the Interior. 15. Model of Manning Grain Harvester, 1831. USNM 46812; 1906. Model of horse-drawn reaper measures 16 inches by 8 inches, with a wheel diameter of 6 inches. Projecting iron points at the front end gather the grain, and vibrating knives, powered from the hob of the wheel, cut the grain. Patented by William Manning on May 3, 1831. Gift of United States Department of the Interior. 16. Model of Boyce Grain Harvester, 1799. USNM 46812; 1906. This model, made of wood and iron, is 15 inches long, 6 inches wide, and 5-1/2 inches high. Six rotating knives radically positioned on a vertical shaft rotate by level gearing on the wheel axle. The whole is mounted on a two-wheeled cart with shafts for draft animals. English patent number 2324 granted to James Boyce in 1799. Gift of United States Department of the Interior. 17. Model of Newbold Plow, 1797. USNM 46812; 1906. This model of a metal plow, with wooden beam and handles 14 inches long, represents the plow patented by Charles Newbold on June 26, 1797, the first American patent for a cast-iron plow. Moldboard, share, and landside were cast in one piece. If the plow broke, it became totally useless. Not until the parts were made in separate pieces did the iron plow come into wide use. The cast iron broke more readily than did the later wrought-iron plows. Gift of United States Department of the Interior. 18. Winnowing Basket, about 1750. USNM 54513; 1912. Used by the three Richardson brothers, the first settlers of Woburn, Massachusetts. The threshed grain could be winnowed in two ways. It could be poured slowly from the edge of the basket in a breeze, where the heavier grain fell to the ground while the chaff blew away. More commonly, the farmer tossed the grain into the air and caught it in the basket, while the chaff blew away. This rectangular basket measures 50 inches by 30 inches. Gift of Mrs. Clarissa W. Samson, West Medford, Massachusetts. [Illustration: Figure 2.--De Laval centrifugal cream separator of 1879. (An earlier version of Catalog No. 19.)] 19. Centrifugal Cream Separator, 1914. USNM 56432; 1914. Carl Gustav De Laval of Sweden invented this successful continuous-flow cream separator in 1879. Loaned by De Laval Separator Company, New York, New York. 20. Model Tractor, 1919. USNM 64098; 1919. No particular manufacturer seems represented by this spring-driven toy, which merely represents tractors of around 1919. The heavy-duty field tractor has four widely spaced iron wheels. Gift of Toy Manufacturers of the United States, New York, New York.