Inside Out Library · ExploreMeasurements of vertical air currents in the atmosphere (1931)NASA Technical Reports Server (NTRS) · leaf 12NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Measurements of vertical air currents in the atmosphereMore like this
![An illustration from Annual Report of the National Advisory Committee for Aeronautics (1st). [Administrative Report Including Technical Reports Nos. 1 to 7] (1916)](https://img.insideoutlibrary.com/img/200/ia-NASA_NTRS_Archive_19930091025-188-0.webp)
