The organization of a typical college of agriculture is shown in a chart reproduced herewith. The threefold purpose of organization-teaching, research, and extension-is accomplished through eight important departments devoted to the fundamental sciences, plant production, animal production, agrotechny, rural engineering, rural economics and sociology, agricultural education, and home economics.

The main divisions of agriculture and its related sciences are set forth below. The fundamental sciences included are agricultural physics, agricultural chemistry, agricultural botany, agricultural bacteriology, plant pathology, economic zoology (subdivided as insects,

birds, and mammals), and economics. Plant production includes agronomy, horticulture, and forestry; animal production includes breeding, feeding, management, and diseases; agrotechny includes dairying, sugar making, milling, etc.; rural engineering includes farm mechanics, farm buildings, irrigation, drainage, and roads. Finally, rural economics and sociology are subdivided as farm management, economics, and rural organization.

Figure 28, on page 38, contains a concise statement of the organization and purpose of the Association of American Agricultural Colleges and Experiment Stations. The association is a great delegate body composed of representatives of the land-grant colleges, the State

experiment stations, the United States Bureau of Education, the United States Department of Agriculture, and the Office of Experiment Stations of the Department of Agriculture. The purpose of the association is organization to the end of securing mutual cooperation in all matters dealing with the advancement of agriculture through all its phases in this country.

An interesting summary of statistics of the agricultural experiment stations in the United States was contained in one of the charts. It showed graphically the increase between 1904 and 1913 in Federal and State appropriations, etc., from a little more than $1,500,000 to

nearly $4,500,000. The persons employed in 1904 were 795. These had increased in 1913 to 1,639. The publications for the same period had practically doubled, and the people reached through mailing lists had increased from 685,301 to 1,010,668.

A concise statement of national extension work in agriculture and home economics under the Smith-Lever Act is presented in chart form on page 40.

The funds, it is shown, are administered by the State colleges of agriculture, in cooperation with the United States Department of Agriculture, which have the further cooperation of State depart

ments of agriculture and education, and many other voluntary National, State, and local organizations. The principal lines of extension work are demonstrations with field crops, spraying, animal husbandry, dairying and farm management, boys' and girls' clubs, movable schools, meetings of farmers and their families, distribution of publications, information through correspondence, and advice through personal visits.

Another chart showed, year by year, the amount of Federal aid to which the States are eligible under the Smith-Lever Act. Each State college of agriculture receives perpetually $10,000 annually without

requiring additional appropriations from the State. The act provides further for an annual increase in the fund for each State, based on the per cent that the rural population of the State bears to the total rural population of the Nation. This increase, however, is contingent on similar annual appropriations to be voted by the legislatures of the several States.

The ultimate work of the agricultural extension service is in the hands of the so-called county agricultural agents, who are supported in part through the extension funds mentioned above, and partly through local support. The map on page 42 gives the distribution of the county agents over the United States.

The South, according to the map, has the most extensive service. Work was begun by the Federal Government in cooperation with the General Education Board a number of years ago. The light shade in the map indicates that the cooperation consists of payment in full or in part of the agents' salaries and expenses, the black that the expenses for maintaining the agents are met wholly by Federal funds, and the black dots indicate counties in which girls' clubs are established with county agents in charge. Industrial clubs are otherwise established in practically every State of the Union, partly under the direction of the Department of Agriculture and partly under the direction of the different State departments of education.

Thirteen representative States were included in this division of the United States Government section. The exhibits were planned chiefly to emphasize the work of the State agricultural colleges and experiment stations for the advancement of agriculture, and fall properly under the heads of agronomy, agricultural engineering, agricultural technology, animal husbandry, dairy husbandry, forestry, horticulture, plant pathology, rural economics and sociology, and soils and fertilizers. Several of the exhibits were planned for the purpose of emphasizing one single experiment-and these were among the most effective-while others were more general in nature.

Taken as a whole, these exhibits showed graphically the important work the State colleges of agriculture and experiment stations are attempting for scientific agriculture in their respective sections of the country.

The exhibits are arranged below mainly according to floor position in the Palace of Education and without regard to other classification. Animal husbandry.-In this section the Pennsylvania State College institute of animal nutrition had on exhibit a model of the respiration calorimeter, which it operates in connection with the

Bureau of Animal Industry in the United States Department of Agriculture.

This remarkable apparatus is designed for experiments with cattle, and by means of it determinations are made of the heat produced and the products of respiration and excretion given off by the animal under experiment in the respiration changes. The amount, composition, and fuel value of the food and excretory products are also determined, and the data thus derived furnish a basis for the calculation of the income and outgo of matter and energy of the animal's body. This furnishes data for studying the nutritive value of different feeding stuffs and rations and other practical problems of animal