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

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[41. PROP. XII.]
[42. PROP. XIII.]
[43. PROP. XIV.]
[44. FINIS.]
[45. A DISCOURSE Concerning a Rem Planet. Tending to prove That ’tis probable our EARTH is one of the PLANETS. The Second Book. By John Wilkins, late L. Biſhop of Cheſter.]
[46. LONDON: Printed by J. D. for John Gellibrand, at the Golden Ball in St. Paul’s Church-Yard. M.DC.LXXXIV.]
[47. To the Reader.]
[48. PROP. I.]
[49. PROP. II.]
[50. PROP. III.]
[51. PROP. IV.]
[52. PROP. V.]
[53. PROP. VI.]
[54. PROP. VII. PROP. VIII. PROP. IX. PROP. X.]
[55. That the EARTH May be a PLANET. PROP. I.]
[56. PROP. II.]
[57. PROP. III.]
[58. PROP. IV.]
[59. PROP. V. That the Scripture, in its proper conſtru-ction, does not any where affirm the Immobility of the Earth.]
[60. PROP. VI. That there is not any Argument from the Words of Scripture, Principles of Na-ture, or Obſervations in Aſtronomy, which can ſuſſiciently evidence the Earth to be in the Gentre of the Uni-verſe.]
[61. PROP. VII. Tis probable that the Sun is in the Gentre of the World.]
[62. PROP. VIII. That there is not any ſufficient reaſon to prove the Earth incapable of thoſe mo-tions which Copernicus aſcribes un-to it.]
[63. Provebimur portu, terræque, verbeſq; recedunt.]
[64. PROP. IX. That it is more probable the Earth does move, than the Sun or Heavens.]
[65. PROP. X. That this Hypotheſis is exactly agreeable to common appearances.]
[66. Quicunq; ſolam mente præcipiti petit]
[67. Brevem replere non valentis ambitum, # Pudebit aucti nominis.]
[68. FINIS.]
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That the Moon may be a World.
Aggregate of the quadrate from A B a
Hundred, and B G a 1000.
will be 1010000.
unto which the Quadrat ariſing from A G
muſt be equal;
according to the 47th Propoſi-
tion in the ſirſt Book of Elements.
There-
fore the whole Line A G is ſomewhat more
than 104.
and the diſtance betwixt H A muſt
be above four Miles, which was the thing to
be prov'd.
But it may be again Objected, if there be
ſuch rugged parts, and ſo high Mountains, why
then cannot we diſcern them at this diſtance ?
why doth the Moon appear unto us ſo exactly
round, and not rather as a Wheel with Teeth.
I anſwer, by reaſon of too great a diſtance;
For if the whole Body appear to our Eye ſo
little, then thoſe parts which bear ſo ſmall a
proportion to the whole, will not at all be ſen-
ſible.
But it may be replyed, if there were any
ſuch remarkable Hills, why does not the Limb
of the Moon appear like a Wheel with Teeth,
to thoſe who look upon it through the great
Perſpective, on whoſe Witneſs you ſo much
depend?
Or what reaſon is there that ſhe ap-
pears as exactly round through it, as ſhe doth
to the bare Eye?
Certainly then, either there
is no ſuch thing as you imagin, or elſe the
Glaſs fails much in this Diſcovery.
To this I ſhall anſwer out of Galilæus.
1. You muſt know that there is not meer-
ly one rank of Mountains about the edge of
the Moon, but divers Orders, one Mountain
behind another, and ſo there is ſomewhat to
hinder thoſe void ſpaces, which otherwiſe, per-
haps, might appear.

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