United States.
Engineer Department. No. 2 in *“20%”.90.26
Papers on the subject of national defences, in reply to a com- munication from the Secretary of War.
= [ Washington, 1851.] 122 pp. 8°.
[This work is kept on the Special Libraries Floor.]
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Jan. 18, IQOI *D82094 — United States. Fortification. — Fortification.