United States. Army Division of Military Aeronautics · leaf 258
balloons. Figure 18. 2. Scotch thread, which is now used instead of the thread from Brittany. We have not been able to obtain the latter since the war began. It is a larger and stronger linen thread, used only for darning by hand. 3. Cotton thread, used only to make repairs in “calico” balloons…
Balloons · Aeronautics, Military
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Balloon notes], 1917, leaf 258](https://img.insideoutlibrary.com/img/1024/ia-balloonnotes01unit-258-0.webp)
