5 Matching Results
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Aerial photography.
A training manual designed to teach aerial photography for military purposes.
Date:
July 8, 1941
Creator:
United States. War Department.
System:
The UNT Digital Library
The biology and control of the sorghum midge.
Describes the life cycle of the sorghum midge, its history in the United States, the damage it can cause to plants, and the steps farmers can take to control the pest and its damage.
Date:
July 1941
Creator:
Walter, E. V. (Elmer Valentine), 1891-
System:
The UNT Digital Library
Ordnance maintenance : prismatic compass, M1918.
Describes the Prismatic Compass, M1918 and provides instructions for its operation, maintenance, and its functions in relation to various types of field artillery.
Date:
July 17, 1941
Creator:
United States. War Department.
System:
The UNT Digital Library
Orientation
Provides a text and reference book covering the principles of orientation. Orientation is defined as "the accurate location of datum points and the establishment of lines of known length and direction".
Date:
July 15, 1941
Creator:
United States. War Department.
System:
The UNT Digital Library
The yellow chapote, a native host of the Mexican fruitfly.
Describes the yellow chapote tree that grows in southern Texas and Mexico, its uses and benefits, and the damage that the Mexican fruitfly causes to the tree.
Date:
July 1941
Creator:
Plummer, C. C.; McPhail, M. & Monk, J. W.
System:
The UNT Digital Library