The Mathematicall Praeface to Elements of Geometrie of Euclid of MegaraDee, John
Philosophy
The Mathematicall Praeface to Elements of Geometrie of Euclid of Megara
Dee, John
Geometry -- Early works to 1800; Mathematics -- Early works to 1800; Philosophy -- Early works to 1800
Now, to procede: +‡Astronomie‡, is an Arte Mathematicall, which
demonstrateth the distance, magnitudes, and all naturall motions,
apparences, and passions propre to the Planets and fixed Sterres: for
any time past, present and to come: in respect of a certaine Horizon, or
without respect of any Horizon.+ By this Arte we are certified of the
distance of the Starry Skye, and of eche _Planete_ from the Centre of
the Earth: and of the greatnes of any Fixed starre sene, or _Planete_,
in respect of the Earthes greatnes. As, we are sure (by this Arte) that
the Solidity, Massines and Body of the _Sonne_, conteineth the quantitie
of the whole Earth and Sea, a hundred thre score and two times, lesse by
⅛ one eight parte of the earth. But the Body of the whole earthly globe
and Sea, is bigger then the body of the Mone, three and forty times
lesse by ⅛ of the Mone. Wherfore the _Sonne_ is bigger then the _Mone_,
7000 times, lesse, by 59 39/64 that is, precisely 6940 25/64 bigger then
the _Mone_. And yet the vnskillfull man, would iudge them a like bigge.
Wherfore, of Necessity, the one is much farder from vs, then the other.
The _Sonne_, when he is fardest from the earth (which, now, in our age,
is, when he is in the 8. degree, of Cancer) is, 1179 Semidiameters of
the Earth, distante. And the _Mone_ when she is fardest from the earth,
is 68 Semidiameters of the earth and ⅓ The nerest, that the _Mone_
commeth to the earth, is Semidiameters 52¼ The distance of the Starry
Skye is, frõ vs, in Semidiameters of the earth 20081½ Twenty thousand
fourescore, one, and almost a halfe. Subtract from this, the _Mones_
nerest distance, from the Earth: and therof remaineth Semidiameters of
the earth 20029¼ Twenty thousand nine and twenty and a quarter.
[Note.]
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