http://www.dsellers.demon.co.uk/venus/ven_ch1.htm:
Electronic abridged version of the book The Quest to Find
the True Distance of the Sun by D. Sellers, where the history of the transits of Venus and their
relationship to the determination of the Earth-Sun distance is discussed.
http://www.dsellers.demon.co.uk/venus/ven_ch8.htm:
Communication presented by Edmond Halley in 1716 before the Royal Society de
Londres proposing the method of the transits of Venus to measure the Earth-Sun
distance.