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James Ferguson

James Ferguson authored Astronomy Explained Upon Sir Isaac Newton's Principles and Made Easy to Those Who Have Not Studied Mathematics.  Below are excerpted images from one edition.

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http://www.dsellers.demon.co.uk/venus/ven_ch8.htm
Edmond Halley's admonition of 1716, in which he proposes a method to determine solar parallax and measure the distance to the sun by timing a transit of Venus from multiple sites across the globe; with notes by James Ferguson.

www.transitofvenus.org

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