Inside Out Library · ExploreEffect of temperature and pressure on the sparking voltage (1920)NASA Technical Reports Server (NTRS) · leaf 8NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Effect of temperature and pressure on the sparking voltageMore 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_19930091025-178-0.webp)