16
Conjectures concerning
Book I.
I have obſerved the ſame Proportion,The Proportion of the Magnitude of the Planets, in reſpect of one another, and the Sun. of their Diameters to that of the Sun, that I publiſhed to the World in my Book of The Appearances of Saturn: namely, the Diameter of the Ring round Saturn is to that of the Sun as 11 as to 37; that of Saturn himſelf about 5 to 37; that of Jupiter as 2 to 11; that of Mars as to 1 to 166; of the Earth as 1 to 111; and of Venus as 1 to 84: to which I ſhall now add that of Mercury obſerved by Hevelius in the Year 1661, but calculated by my ſelf, and found to be as 1 to 290.
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