plant and animal diseases all helped the living things which form the basis of farming yield. Grain farmers not only had to have a wheat which yielded well but a wheat which resisted the attacks of nature. For example, Turkey Red wheat, introduced in 1873 by Mennonites from Russia, not only survived drought and yielded well but provided the genetic elements for newer breeds of wheat. The farmer not only wanted good-producing meat cattle, such as the Herefords, but had to control diseases and predators which killed the animals. Sick animals do not grow properly or, in the case of dairy animals, give much milk. Steady advances in disease control for both plants and animals brought fewer losses and greater productivity to farmers.

The 19th century also brought scientific discoveries in both plant and animal nutrition. Fertilizer and soil chemistry made great advances through scientific experiments, at first by farmers and later by government servants. The first experiment station in the modern era began in Connecticut in 1875, and in 1887 the Congress established such stations in every state in conjunction with the agricultural Land Grant colleges. Scientists at many of the stations also made discoveries in animal nutrition. For example, as a result of animal feeding experiments E. V. McCollum discovered vitamins A and B at the experiment station in Wisconsin in 1915.

None of these scientific advances left much residue in the form of artifacts for museums, but the reality of the changes should not be obscured by the lack of objects on exhibit. Even so, some of the related equipment survived. For example, the centrifuge used in the butterfat test, discovered in 1890 by Stephen M. Babcock, survived in several forms. Manure spreaders and tree sprayers, reflective of advances in biochemistry, also survived. But these only suggest the more important biological control activities for which these machines and tools served merely as agents in some way.

The 20th century introduced Americans to total war. World Wars I and II demanded the total mobilization of all resources by all contenders. In both conflicts America became the food reservoir of the Allies. From a technological view, the wars engendered a level of prosperity which both allowed and encouraged farmers to adopt new methods and devices. The principal technological change in farms was the widespread adoption of the internal combustion tractor, first used in 1892. Inventors and manufacturers gradually but constantly improved tractors along with the various devices attached to them. Most notable were the corn picker, in 1909, and the cotton picker, in 1942. (Dates are for commercial production in each instance.) Farmers found both machines impracticable until a power source independent of the ground wheel had been developed. More than anything else the tractor and its related equipment finally set men free from the worst drudgery of farming. It also set many farmers free from the need to farm at all.

The tractor and its equipment accomplished several other remarkable things, some obvious and some not so obvious. First, it allowed the farmer to get rid of horses and mules, and these animals steadily declined—to such an extent that in the 1960s the census did not even bother to count them. As a result of this decline, land that farmers had used to raise feed for animals could grow food for people or fodder for dairy animals. The amount of land thus released for other needs finally amounted to perhaps 60 million acres, and maybe even more. The change took place with increasing rapidity into the 20th century.

Also, the tractor sharply reduced labor needs for the major crops of the United States. Even dairying, least susceptible to this sort of improvement, felt the impact of the tractor in such things as harvesting fodder and storing silage by running loaders off the tractor power-take-off. Since the very founding of agriculture men had discovered only one way to prosper in farming. The farmer had to exploit somebody or something. Animals, serfs, slaves, tenants, sharecroppers, or whatever, including the farmer's family and farm, had at various times been exploited on the farmer's way to success. After the age of machinery, however, the farmer tended to exploit the machine instead of other people or things. People had to leave farming, but in the long run they benefited from their removal. The machine had set them free. Chief of the machines was the gasoline tractor.

The influence of science and technology inside a free society may have been even more profound than seems at first glance. The farming of the 20th century, with its chemicals, genetics, machines, and all, required not only vast infusions of capital but brains and a considerable knowledge. Farmers had to be literate at the very least. Elitist systems, where one group of people get educated and the others get worked, could not accomplish much in the modern agricultural world. Furthermore, notions of two kinds of education—one for the better sort who think, and another for the inferiors who do the work—could and did seriously impede the development of a modern agriculture. The backwardness of most of the world, the poverty of the underdeveloped countries, stemmed in large part from the impediments created by an ignorant population.

A country like the United States with its highly technical and scientific farming could not afford, simply could not endure, limited educational opportunities for its people. Neither could it long endure any class structure which placed farmers in an inferior position; for when men feel inferior because of their work they tend to shift to some other task, leaving the despised work to those who cannot avoid it. A highly developed agriculture in the hands of the truly inferior, the stupid and uneducated, would simply collapse. America, the land of plenty, had to maintain a high level of education open to all and a society where men reached status, at least partly, by effort and talent. In 20th century America the comparative social and economic equality continued, in large part, because the level of technology and science used in America demanded it. This equality may be one of the most important consequences of the technological and scientific advances in agriculture during the years 1607-1972.

Catalog of Agricultural Implements and

Machines in the Collection

In the following catalog the items are listed numerically in the order in which the museum received them, with the earliest first and the latest last. This arrangement permits expansion and reissue of the catalog simply by adding new entries; and the user of the catalog can easily find everything acquired in any given year. In effect, the catalog thus presents an historical account of the development of the museum collection. Following the item's title appears the National Museum accession number (USNM number); year of accession, if known; description; and donor.

The index to the catalog has several major categories of cross-referenced entries. In addition to the general object class, such as "Tractor," it includes use-entries, such as "Plant husbandry," the names of donors, vendors, and those who arranged for the gifts.

1. Korean Sketch of Farming in the Late 18th Century. USNM 19048; 1887. Korean farmers plowing and breaking clods of earth. Painted by Han Chin U. Gift of G. Goward, Washington, D. C.

2. Korean Sketch of Threshing in the Late 18th Century. USNM 19048; 1887. Korean farmers threshing rice. By Han Chin U. Gift of G. Goward, Washington, D. C.

3. Korean Fishing Scene of the Late 18th Century. USNM 19048; 1887. Koreans using a fish trap. By Han Chin U. Gift of G. Goward, Washington, D. C.

4. Scene of Korean Farmers