Engraving by J Mynde after an original drawing by James Ferguson, taken from Ferguson's 'Astronomy Explained upon Newton's Principles' (1756). The diagrams illustrate the causes and results of lunar and solar eclipses. Ferguson (1710-1776), was a self-taught Scottish astronomer, who developed a variety of models for demonstrating astronomical and mechanical principles. In 1748 he began a series of popular lectures on science and astronomy, some of which were attended by George III, who had a keen interest in the sciences.
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