James Ferguson, Scottish astronomer, 1776.
© Science Museum / Science & Society Picture Library
Mezzotint by John Townsend after Robert Stewart, dated 27 December 1776. Ferguson (1710-1776) drew up Astronomical Rotula for showing the motions of the planets and the positions of the sun and moon. He also built an orrery, and invented a tide-dial. He observed the transit of Venus, and presented the Royal Society with a projection of the partial solar eclipse of 1764. He devised astronomical and mechanical models, and gave public lectures on experimental philosophy and electricity.