Series C: Lesson 4, Petroleum and its uses.
Lesson 5, Conservation as exemplified by irrigation projects.
Lesson 6, Checking waste in the production and use of coal.
Lesson 10, Iron and steel.
Lesson 14, The United States Fuel Administration.
Lesson 16, The Commercial Economy Board of the Council
of National Defense.

Reports of your State Agricultural College and Experiment Station,
and of your State Geologist and other officers having to do with
the natural resources of your state.

Annual Reports of the Secretary of the Interior. That for 1915
(pp. 1-30) contains an interesting review of our natural resources
and their use; also (pp. 151-209) a comprehensive and interesting
discussion of our mineral resources and their development. That
for 1918 contains an account of the plan for land reclamation by
and for soldiers.

Publications of the Geological Survey, the Bureau of Mines, and
the Reclamation Service (all in the Department of the Interior),
and of the Bureau of Fisheries (Department of Commerce).

Publications of the Forestry Service (Department of Agriculture).

Among the numerous publications of the Department of Agriculture
may be mentioned:

Farmers' Bulletin 340(Declaration of Governors for the