Papers of John Guy Porter

A copy of Porter's script for 'The Night Sky in April' on debris in space; Venus in the evening sky, its phases, Jupiter and Saturn in the south and Mercury in a position to be seen; the 'emptiness' of space, dust in space, the solar corona at eclipse and the zodiacal light; the theory of the cause of this light; meteors, dust particles, fireballs and meteorites; meteor observations now better done by radar, meteor showers and the Lyrids, with their radiant near Vega; Cygnus and the Milky Way, meteoric dust originating from comets, or what will be comets, and meteors being detected in daylight by radar; and the dust settling on Earth, the methods used to collect it and micrometeorites.