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[A Tellurion.] Plate VIII.

[A Tellurion.] Plate VIII.

J. Ferguson delin. J. Mynde sc.
[London: James Ferguson, c.1756.]
Engraving. Sheet 210 x 330mm (8¼ x 13"). Trimmed into plate top and bottom, as issued, affecting signatures, binding folds.
Three illustrations of a tellurion, a device to depicts how day, night, and the seasons are caused by the rotation and orientation of Earth on its axis and its orbit around the Sun. From Ferguson's own work, ''Astronomy Explained Upon Sir Isaac Newton's Principles''. The title given comes from the text explaining the diagram, which is available in full from Project Gutenburg, at https://www.gutenberg.org/files/60619/60619-h/60619-h.htm
[Ref: 56854]  £160.00


 

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