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pn explained upon Sir Isaac Newton's principles.
Ferguson, James, 1710-1776.
Astronomy explained upon Sir Isaac Newton's principles, and made easy to those who have not studied mathematics. To which are added, A plain method of finding the distances of all the pla- nets from the sun, by the transit of Venus over the sun's disc, in the year 1761: An account of Mr. Horrox's observation of the transit of Ve- nus, in the year 1639: and of the distances of all the planets from the sun, as deduced from observations of the transit in the year 1761.
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