RGO Archives/RGO 45 contains:
<-- See earlier
258	Script for 'The Night Sky in January'
259	Number unassigned
260	Script for 'The Night Sky in March'
261	Script for 'The Night Sky in April'
262	Script for 'The Night Sky in May'
263	Script for 'The Night Sky in June'
264	Script for 'The Night Sky in July'
265	Number unassigned
266	Script for 'The Night Sky in September'
267	Script for 'The Night Sky in October'
268	Number unassigned
See later -->

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Papers of John Guy Porter

Title	Script for 'The Night Sky in June'
Reference	RGO 45/263
Covering Dates	June 1952
Extent and Medium	5 pages

Content and context

A copy of Porter's script for 'The Night Sky in June' on Mars, Saturn and Jupiter; Mercury occulted by the Moon, 23 June 1952; summer solstice and ancient time-keeping; Vega, Arcturus and Capella, Cygnus, and Draco, with Etanim near the zenith; time-keeping and the slowing of the Earth's rotation due to tidal friction; and the Photographic Zenith Tube, chronometers and seasonal differences in the rate of rotation.

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