United States. Army Division of Military Aeronautics · leaf 420
PLATE LVIII. — Demolitions of batteries (1). … 1. TMs snow photo shows exact front of battery A which photo No. 2 leaves in doubt. 2. Apparent front of battery which is really at A. 3. On this oblique view, the casemates have been exactly marked. The embrasures are visible (170) 1
Balloons · Aeronautics, Military
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Balloon notes], 1917, leaf 420](https://img.insideoutlibrary.com/img/1024/ia-balloonnotes02unit-420-0.webp)
