The work was devoted to the collection and presentation of geologic data relating to field works; water supply; and road material.
Such localities should be avoided, or the field works placed above the line of springs or seepages.
Unfavorable to all field works on account of ground-water and floods, and not thick enough for cave shelters.
These should be avoided as far as possible in the location of field works, especially of dugouts.
Clay shales and clay hold both surface and underground water, and are, therefore, unfavorable for field works.
Pope retreated, and that night crossed Bull Run and took position behind the field works at Centreville.
Building fortifications—both permanent works and temporary or field works.
These field works will be constructed principally around Gatun and Pedro Miguel.
The bridgehead of Radymno consisted of a threefold line of field works.
The fortifications were only field works, and might have been overrun in less than five days by an audacious enemy.