Starlight is falling on every square mile of the earth's surface, and the best we can do at present is to gather up and concentrate the rays that strike at area 100 inches in diameter.
Signals from the Stars (ed. 1931)
Starlight is falling on every square mile of the earth's surface, and the best we can do at present is to gather up and concentrate the rays that strike at area 100 inches in diameter.
Signals from the Stars (ed. 1931)