'The four wheel'd orrery' vinegar as it would appear in

as it would appear in Greenwich Park from the Observatory

The model for the painting is possibly George White

'The brilliancy of Venus [top left of image] was a spectacle which was naturally contemplated as in harmony with the rest of the day

Plate 1 from the book Observations on the cow-pock

'The four wheel'd orrery' vinegar as it would appear inThe four wheel'd orrery' from A dissertation upon the phaenomena of the harvest Moon; also, The description and use of a new four wheel'd orrery, and an Essay upon the Moon's turning round on her own axis, by James Ferguson (London, 1747). James Ferguson (17101776) was a natural philosopher and inventor of scientific instruments. An orrery is a mechanical model of the Solar System, based on Copernican principles. Original: engraving. 1747