Wilkins, John, A discovery of a new world : or a discourse tending to prove, that 'tis probable there may be another Habitable World in the Moon ; with a discourse concerning the Probability of a Passage thither; unto which is added, a discourse concerning a New Planet, tending to prove, that 'tis probable our earth is one of the Planets

Page concordance

< >
Scan Original
221 41
222 42
223 43
224 44
225 45
226 46
227 47
228 48
229 49
230 50
231 51
232 52
233 53
234 54
235 55
236 56
237 57
238 58
239 59
240 60
241 61
242 62
243 63
244 64
245 65
246 66
247 67
248 68
249 69
250 70
< >
page |< < (104) of 370 > >|
284104That the Earth may be a Planet. anſwerable to the ſeveral diſtances of the
Planets from one another.
Thus a Cube will meaſure the diſtance be-
twixt Saturn and Jupiter;
a Pyramis or Te-
traëdron, the diſtance betwixt Jupiter and
Mars ;
a Dodecaëdron, the diſtance betwixt
Mars and the Earth;
an Icoſaëdron, the diſtance
betwixt the Earth &
Venus; and an Octoëdron,
the diſtance betwixt Venus &
Mercury: that
is, if we conceive a Circumference deſcri-
bed immediately without the Cube, and a-
nother within it, the diſtance between theſe
two, will ſhew what proportional diſtance
there is betwixt the Orb of Saturn, and
that of Jupiter.
Thus alſo, if you con-
ceive a Circumference deſcribed on the out-
ſide of a Pyramis, or Tetraëdron, and ano-
ther within it, this will ſhew ſuch a propor-
tional diſtance, as there is betwixt the Orb
of Mars, from that of Jupiter.
And ſo of
the reſt.
Now if any ask why there are but ſix
Planetary Orbs?
Keplar anſwers, Zuia non
oportet plures quàm quinque proportiones eſſe,
totidem nempè quot regularia ſunt in Matheſi
corpora.
Sex autem termini conſummant hunc
proportionum numerum:
Becauſe there are
but five proportions, ſo many as there are
regular Bodies in Mathematicks, each of
whoſe Sides and Angles are equal one to
another.
But now there are ſix terms re-
quired to conſummate this number of pro-
portions;
and ſo conſequently, there can
be but ſix primary Planets.

Text layer

  • Dictionary

Text normalization

  • Original

Search


  • Exact
  • All forms
  • Fulltext index
  • Morphological index