into th2 Land , and have a bredth capable to be obferved- 
There are Fhxes in certain places,that reach into large Goun- 
triesj^nough to make there fomc apparent change^& in fooie 
of our Seas there float fometimcs fuch bulky inaffes of Ice^ 
that are far great er^than the Objefts^ which we areaffured ^ 
we can fee in the Mooff, Again, we cut down whole Forrefts, 
and drain MariQies, of an extent large enough to cauft a 
notable alteration: And men have made fuch works , as 
have produced Changes great enough to be perceived* In 
many places alfo are Vulcans ^ that feem big enough to be 
diftinguifli't , cfpecially in the fhadow : And when Fire 
lights upon Forrefts of great extent ^ or upon Towns, it 
can hardly be doubted, but thefe Luminous Objeds Would 
appear either in an Ecclipfe of the Earth, or when fuch partf 
of the Earth are not illuminated by the Sun, But yetjknow 
no man , who hath obferved fuch things in the Moon ; and 
one may be rationally affured that no Vulcans are there, or 
or that none of them burn atthistime. This it is C/^ he 
goes on ) which all Curious men ^ that have good Telefcopes^ 
ought well to attend 5 and I doubt not, but, if we had a ve« 
ry particular Map odhe Moo^^zs I had defigned to make one 
with a Topography , as it were , of all the confiderable places 
therein, that We or our Pofterity would find fomc changes 
in Her. And if the AI^pps of the Moofi of Hevelms^Dwim ^znd 
Eicciolt^zxQ exaft,! can fay,that I havefeen there fome places 
confiderable enough, where theyi^xxl parts that are clear ^ 
whereas I there fee dark_oms. Tis true that if therebci'e^x 
in the Moon , it can hardly fall out otherwife , than it doth 
upon our Earthy where Alluvium* s are made in fome places, 
and the Sea gains upon the Land in others, ^fy » if thofe 
Spots we fee in the Moon , are Seas , as moft believe them to 
be b whereas I have many reafons , that make me doubt ^ 
whether they be fo 5 of which I (hall fpeak elfewhere. And 
I have fometimes thought, whether it might not be, that all 
the Seas of the A^oon , if there muft be Seas , were on the 
fide of the other Bemifpbere^ and that for this caufeit might 
be that xh^ Moon t urns not upon its ^jvi/ , asourH^r/^, 
K 2 wherein 
