68 BULLETIN 1440, U. S. DEPARTMENT OF AGRICULTURE 
(13) Harvard University Committee on Economic Research. 
1923. general business conditions. Harv. Econ. Serv. 2: 33a-338, 
illus. (Weekly Letter, no. 51.) 
(14) 
1924-25. monthly statistical survey. Harvard Econ. Serv. 3: 359- 
366, illus., 1924; 4: 207-214, 275-282, illus., 1925. (Weekly 
Letter, no. 50, 1924; nos. 28, 37, 1925.) 
(15) Hawthorne, H. W., and Dixon, H. M. 
1924. FARM organization AND MANAGEMENT IN CLINTON COUNTY, 
Indiana. U. S. Dept. Agr. Bui. 1258, 68 p., illus. 
(16) Marshall, H. C. 
1925. RETAIL MARKETING OF MEATS. AGENCIES OF DISTRIBUTION, 
METHODS OF MERCHANDISING, AND OPERATING EXPENSES AND 
profits. IT. S. Dept. Agr. Bui. 1317, 86 p., illus. 
(17) Mitchell, W. C. 
1921. INDEX NUMBERS OF WHOLESALE PRICES IN THE UNITED STATES 
and foreign countries. U. S. Dept. Labor, Bur. Labor 
Statis. Bui. 284, 350 p., illus. 
(18) Persons, W. M. 
1919. AN INDEX OF GENERAL BUSINESS CONDITIONS. Rev. Econ. Statis. 
Prelim, vol. 1: 111-211, illus. 
(19) and Coyle, E. S. 
1921. A COMMODITY PRICE INDEX OF BUSINESS CYCLES. Rev. Econ. 
Statis. Prelim, vol. 3: 353-369, illus. 
(20) Sarle, C. F. 
1925. forecasting the price of hogs. Amer. Econ. Rev., v. 15, no. 3, 
sup. no. 2, 22 p., illus. 
(21) Smith, B. B. 
1925. forecasting the acreage of cotton. Jour. Amer. Statis. 
Assoc, (n. s. no. 149) 20: 31-47, illus. 
(22) Spillman, W. J., and Lang, E. 
1924. the law of diminishing returns. 178 p., illus. Yonkers-on- 
Hudson, New York, and Chicago. 
(23) Tolley, H. R., Black, J. D., and Ezertel, M. J. B. 
1924. INPUT AS RELATED to output in farm organization and cost-of- 
production studies. U. S. Dept. Agr. Bui. 1277, 44 p., illus. 
(24) United States Department of Commerce. Bureau of Foreign and 
Domestic Commerce. 
1914-1926. monthly summary of foreign commerce of the united 
states, july, 1914, to December, 1925. Washington, D. C. 
(25) United States Department of Labor. Bureau of Labor Statistics. 
1925. wholesale prices, 1890 to 1923. U. S. Dept. Labor, Bur. Labor 
Statis. Bui. 367, 270 p., illus. 
(26) 
1925. wholesale prices, 1890 to 1924. U. S. Dept. Labor, Bur. Labor 
Statis. Bui. 390, 252 p., illus. 
(27) United States Treasury Department. Bureau of Statistics. 
1896-1914. monthly summary of commerce and finance of the 
united states, January, 1896, to june, 1914. Washington, 
D. C. 
(28) Wallace, H. A. 
1920. agricultural prices. 224 p., illus. Des Moines, Iowa. 
(29) Warren, G. F; 
1914. farm management. 590 p., illus. New York. 
(30) 
1921. PRICES OF FARM PRODUCTS IN THE UNITED STATES. U. S. Dept. 
Agr. Bui. 999, 72 p., illus. 
(31) and Pearson, F. A. 
1924. THE AGRICULTURAL SITUATION, ECONOMIC EFFECTS OF FLUCTUAT- 
ING prices. 306 p., illus. New York. 
(32) W t entworth, E. N., and Ellinger, T. U. 
1924. the determination of hog prices at public markets. Jour. 
Farm Econ. 6: 279-282. 
(33) Working, H. 
1925. the statistical determination of demand curves. Quart. 
Jour. Econ. 39: 503-543, illus. 
(34) Wright, S. 
1925. corn and hog correlations. U. S. Dept. Agr. Bui. 1300, 60 p., illus.. 
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