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such bulky'Mafle& of Ice, that are far greater than the Objects, which we areastured we can soe irt the’ Moon. Agairi, wecut down whole Forrests, and DrainMarshes, of an Extent large enough to caule a notable Alteration : And Menhave made such Works, as have produced Changes great enough to be per-ceived. In many 1 places also are Vulcims that soem big enough to bedistinguilhr,especially in the Shadow. And when Fire lights upon Forests of great Extent,or upon Towns, it can hardly be doubtcd, but theso Luminous Objects wouldappear eithcr in an Eclipse of the Earth, or when such parts of the Earth arenot lllummated by the Surr. But yet, I khow no Man, who bath yet cbfervedsuch things in the Moon ; and öne may be rationally aflur’d, that no Vukans arethere, or that none of them Burn at this time. This it is, which all curiousMen, that have good Telescopes, ought well to attend ; and I doubt not, butif we had a very particular Map of the Moon, as I had design’d to make one,wich a Topograph?, as it 'were, of all the considefable Places therein, that weor ourFostcrity would find lbme Change in Her. And ifthe Maps of the Moonof Hcvelius, Divini , and RJccioli, are exact, I can lay that I have soen therelbme places considerable enough, where they put Parts that are Ciear, wherc-as I there leeDark ones. ’Tis true, that if there be Leas in the Moon, it canhardly fall out otherwile, than it doth upon our Earth, where Alluviums aremade in some Places, and the Sea gains upon the Land in otbers; 1 läy, If

thole Spots we soe in the Moon are SeaS, as I must believe them to be, where-as I have many Reasons, that make me doubt, whether they be so. And Ihave sometimes thought, whether itmight not be, that all theSeas of the Moon,if there must l>e Seas, were on the fide of the orher Hemifphere, and that forthis Caule it might be, that the Moon turns not upon its Axis, as our Earthwherein the Lands andSeas are as it were Ballanccd : That thence also may pro-ceed the Non-appearance bl any Clouds raisod there, or of any Vapours confide-iidcrable enough to be soen, as there are raiscd upon this Earth; and that thisAblence of Vapours is perhaps the Caule, that noCrepulcle is there, as it leern sthere is none, my solf at leait not having been hitherto able to dileern any Markthereof: For methinks, itis not tobe doubtcd, ’but that the reputed Citixens of theMooo, might soe our Crepusole, fiiice we soe, that the läme is without Com-parison stronger, than the Light afforded us by the Moon, evtn when fhe isFui; for a little aster Sun-sor, when we rcceive no more the first Light of theSun, the Sky is far clearer, than it is in the Faircst Night of the Füll Moon.Mean while, fince we soe in the Moon, when fhe is Encreasing or Decreasing,the Light fhe receives from the Earth, we- can not doubt, but that the People'of the Moon lhould likewi/e soe in the Earth that Light, wherewith the Moonilluminares it, with perhaps the difterence there is betwixt their Bignefs. Muchrather therefore fhould they soe the Light of the Crepusole, being as We havelaid, incomparably greater. In the mean time, we soe not any Faint Lightbeyond the Section of the Light, which is every where almost equally strong,and we there distinguisti ndthing at all, not so much that clearest part, which.is calfd Arißarchus, or Porphyritcs , as I have osten try’d ; although one may*there soe the Light, which the Earth fends thither, which is sometimeslso strong,that in the Moon’s Decreaso, I have osten distinctly soen all the Parts of theMoon that were not Enlightned by the Sun, together with the Difterence of the

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