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The Orrery, made by James Ferguson.
J. Ferguson inv. et deline. G. Child Sculp.t.
[n.d., 1756].
Engraving, sheet Trimmed and glued to backing sheet. Creases where previously folded. Publication line faded.
Frontispiece from 'Astronomy explained upon Sir Isaac Newton’s Principles' 1756. Diagram of James Ferguson's Orrery with key. James Ferguson (1710 – 1776) was a Scottish astronomer, author and itinerant lecturer. He is known as the inventor and improver of astronomical and other scientific apparatus and as a striking instance of self-education.
[Ref: 56983] £65.00
(£78.00 incl.VAT)
[A machine for shewing the sidereal, the equal, and the solar Time.] Pl. VII.
J. Ferguson inv. et 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, binding folds.
A diagram of a machine designed by Scottish astronomer (1710-76), to demonstrate the different ways of measuring a turn of the Earth around its axis. 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: 56853] £65.00
(£78.00 incl.VAT)
[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
(£192.00 incl.VAT)
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