[226.] Sample Fertilizers, 1960. USNM 238503; 1961. Samples of six types of fertilizer in common use at the time. Gift of Dr. John B. Blake, Washington, D. C.
[227.] Sample Fertilizers, 1960. USNM 238503; 1961. Samples of eight types of fertilizer in common use at the time. Gift of Dr. John B. Blake, Washington, D. C.
[228.] Sample Fertilizers, 1960. USNM 238503; 1961. Samples of six types of fertilizer in common use at the time. Gift of Dr. John B. Blake, Washington, D. C.
[229.] Sample Fertilizers, 1960. USNM 238503; 1961. Samples of thirteen types of fertilizers in common use at the time. Gift of Dr. John B. Blake, Washington, D. C.
[230.] Cast-Iron Centrifuge, 1960. USNM 238503; 1961. A centrifuge used for running the Babcock milk test, which determined the percentage of butterfat. Gift of Dr. John B. Blake, Washington, D. C.
[231.] Insecticide, 1960. USNM 238503; 1961. A sample of a Pyrox insecticide in common use in 1960. Gift of Dr. John B. Blake, Washington, D. C.
[232.] Hoe, 20th century. USNM 239136; 1961. A socket-type, three-tine hoe used to weed vegetable gardens, tobacco, and similar row crops. Gift of Mrs. Henry H. Byrne, Washington, D. C.
[233.] One-Row Planter, about 1870. USNM 237951; 1961. The gears from the drive-wheel mesh with a set of gears that turn the seed plate. The distance for dropping the seed could be determined by the size of the gear used on the drive-wheel. Gift of H. C. Cole, Crestline, Ohio.
[234.] Portable Gasoline Engine, 1903. USNM 240546; 1961. This machine provided belting power for operating feed mills, cream separators, wood saws, etc. It generated 2 hp at 300-600 rpm. It was covered by two patents dated April 7, 1903. Gift of New Holland Machine Co., New Holland, Pennsylvania.
[235.] Cotton Planter, 20th century. USNM 240545; 1961. This one-row, horse-drawn cotton planter drilled cottonseed in rows by means of a revolving wooden drum with one-inch holes spaced around the center of the drum. Gift of Lester Souter, Boerne, Texas.