Eclipses - The Theory of Tides

Steel engraving with original hand colour, drawn and engraved by John Emslie. Published as part of Astronomical Diagrams by James Reynolds, 174 Strand, [London], Undated, but circa 1850.

Sheet size: 9" x 11 1/4".

Very good condition - finely engraved and superbly coloured.

Printed on card, this diagram shows how eclipses take place, and how tides are caused by the influence of the gravity of the Sun and the Moon upon the Earth's seas and oceans. Both lunar and solar eclipses are illustrated, as are the alignments of the Sun and Moon relative to the Earth that give rise to neap and spring tides. 



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