Modern Mechanix June 1932
https://pulpcovers.com/wp-content/uploads/2013/11/Modern-Mechanix-June-1932.jpgSilent guns sending their whistling messengers of death into the sky at speeds far beyond those now attained by powder-driven shells seem likely for the next war, using for propulsion magnetic fields so powerful that when they are short-circuited they produce miniature earthquakes. via
rail_gun
https://pulpcovers.com/wp-content/uploads/2013/11/rail_gun.jpgSilent guns sending their whistling messengers of death into the sky at speeds far beyond those now attained by powder-driven shells seem likely for the next war, using for propulsion magnetic fields so powerful that when they are short-circuited they produce miniature earthquakes. via
Silent guns sending their whistling messengers of death into the sky at speeds far beyond those now attained by powder-driven shells seem likely for the next war, using for propulsion magnetic fields so powerful that when they are short-circuited they produce miniature earthquakes.
via
