conservation of natural resources).

The National Forests and the farmer, YEAR BOOK 1914, 65-88.

Importance of developing our natural resources of potash, YEAR
BOOK 1916, pp. 301-310.

Agriculture and Government reclamation projects, YEAR BOOK 1916,
177-198.

Farms, forests, and erosion, YEAR BOOK 1916, 107-134.

The farm woodlot problem, YEAR BOOK 1914, 439-456.

Economy of farm drainage, YEAR BOOK 1914, 245-256.

Economic waste from soil erosion, YEAR BOOK 1913, 207-220.

Unprofitable acres, YEAR BOOK 1915, 147-154.

Consult "Guide to United States Government Publications," U.S.
Bureau of Education Bulletin, 1918, No. 2; also, "The Federal
Executive Departments as Sources of Information," U.S. Bureau of
Education Bulletin, 1919, No. 74.

Report of the National Conservation Commission (1909), Senate
Document 676, 60th Congress, 2nd Session.