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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.