Subject ASC0000bn4

The Intellectual observer.
v.5 (1864), Page 101 (1864)
Harvard University, MCZ, Ernst Mayr Library
BHL Page 39488244

Keywords

astronomy day/night cycle sun Sun Earth light daylight earth latitude long days short nights northern summer June 21st Tropic of Cancer horizon mid-day sunrise sunset equator meteorology midnight sun diagram hemisphere astrophysics diagram midnight Sun long days short nights northern summer

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