Today, August 19th, marks National Aviation Day and we’re celebrating with a lesser-known flying vehicle — the airship. Emil Schimpf’s ballooning manuscript Vorläufige Instruction über Zusammensetzung Gebrauch des Luftschifferparks was recently added to the Smithsonian Transcription Center and is available for crowd-sourced transcription. Schimpf was a Second Lieutenant in the Badischen Pionier Bataillon Nr. 14, <a href="https://blog.library.si.edu/blog/2016/08/19/explore-emil-schimpfs-airships-national-aviation-day/#more-'" class="more-link">more »</a>