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Balloon in flight during U.S. Signal Corps operations at Ft. Myer, Vir...
Stereo copyrighted by Underwood & Underwood. No. 107091. This record contains unverified, old data from caption card, with subsequent revisions.
Balloon, at Ft. Myer, Virginia, during Signal Corps operations, 1907
Stereo copyrighted by Underwood & Underwood. No. U-107124. This record contains unverified, old data from caption card, with subsequent revisions.
Inspection of balloon during U.S. Signal Corps operations at Ft. Myer,...
Stereo copyrighted by Underwood & Underwood. No. U-107118. This record contains unverified, old data from caption card, with subsequent revisions.