Janus: Papers of John Guy Porter

RGO Archives/RGO 45 contains:
<-- See earlier
247	Script for 'The Night Sky in February'
248	Script for 'The Night Sky in March'
249	Script for 'The Night Sky in April'
250	Script for 'The Night Sky in May'
251	Script for 'The Night Sky in June'
252	Script for 'The Night Sky in July'
253	Script for 'The Night Sky in August'
254	Script for 'The Night Sky in September'
255	Script for 'The Night Sky in October'
256	Script for 'The Night Sky in November'
257	Script for 'The Night Sky in December'
See later -->

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Papers of John Guy Porter

Title	Script for 'The Night Sky in July'
Reference	RGO 45/252
Covering Dates	July 1951
Extent and Medium	10 pages

Content and context

Two copies of Porter's script for 'The Night Sky in July' on Chaucer's gift of an astrolabe to his son, early navigation, the Plough and the Pointers; Arcturus in Boötes, Spica in Virgo, and Regulus in Leo; lunar distance as a means of longitude determination, and occultations and appulses of Venus by the Moon from various positions on Earth; and the Moon and the tides, spring tides at new or full Moon, neap tides at first and last quarter, the tidal mechanism, the maxima and minima of tides and the power from the tides.

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