[Balloon notes]
A 1917 United States Army Division of Military Aeronautics publication of balloon notes, compiled for military aeronautics personnel to interpret aerial reconnaissance. The pictures are plane-table style trench and shelter maps from the Flanders, Vosges and Lorraine fronts beside aerial photographs of cratered ground and zigzag trench lines, drawn in fine black line with handwritten French annotations. A designer might take the clean technical linework, grid-north arrows and dense annotation layout as a model for diagrammatic maps.
![Picture 1 of 14 from [Balloon notes] (1917), leaf 108](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-108-0.webp)
![Picture 2 of 14 from [Balloon notes] (1917), leaf 149](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-149-0.webp)
![Picture 3 of 14 from [Balloon notes] (1917), leaf 201](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-201-0.webp)
![Picture 4 of 14 from [Balloon notes] (1917), leaf 235](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-235-0.webp)
![Picture 5 of 14 from [Balloon notes] (1917), leaf 299](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-299-0.webp)
![Picture 6 of 14 from [Balloon notes] (1917), leaf 314](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-314-0.webp)
![Picture 7 of 14 from [Balloon notes] (1917), leaf 328](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-328-0.webp)
![Picture 8 of 14 from [Balloon notes] (1917), leaf 358](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-358-0.webp)
![Picture 9 of 14 from [Balloon notes] (1917), leaf 373](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-373-0.webp)
![Picture 10 of 14 from [Balloon notes] (1917), leaf 381](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-381-0.webp)
![Picture 11 of 14 from [Balloon notes] (1917), leaf 392](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-392-0.webp)
![Picture 12 of 14 from [Balloon notes] (1917), leaf 409](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-409-0.webp)
![Picture 13 of 14 from [Balloon notes] (1917), leaf 420](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-420-0.webp)
![Picture 14 of 14 from [Balloon notes] (1917), leaf 442](https://img.insideoutlibrary.com/img/200/ia-balloonnotes02unit-442-0.webp)