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THE

Chriftian Philofopher '-

A

COLLECTION

O F T H E

BeflDifcoveries in Nature,

WITH

Religious Improvements.

jBy Cotton Mather D. D.

And Fellow of the KoY k-L Society.




LONDON;

Printed for Em Ai^. Matthews, at the Bible in
Pater-Nofler-Row. M. DCC XXL



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mt.thomas mollis,

Merchant in London.



SIR,

HE Learned Author of
the enfuing Treatife^ has
already diftus'd his Name
and Reputation in a great-
Variety of Ufeful Works ;
by which the better Part of Mankind^
do fufficiently know him to be in
Labours more abundant. The Reader*
will find in this Treatife^ a Colledtidn

A z from




iv Dedication.

fionf Writers o( the firll and bed
Cliafatfter, both inour own and othei:
Natiipns i and every Obfcrvation in>
pfovil to die Ends of Devotion and
Tradice. The Remarks that the Au-
thor gives, are (b mingled with the
Difcoveries that he has brought toge-
dier, diat as it ftiows us with what
Spirit He has purfued His Enquiries
into the Wonders of the Univerfe, fo
it is both an Inftruclion and a Pattern
to a ferious Mind. He has generally
drawn into his Application, all that
the Bible faith upon the feveral Sub-
jeds: And thus he lays open the
two great Books of God, Nature and
Scripture. In diis way, our Curiofity
is not onlv entertain d, but fandtified;
the Invifiblt T}jinp of God from the
Creation of the World are fecn^ and
improved to the Glorv ot Him whofe
thev are.

Your furprizinc; Generoficy to die
Academy in Nczu-EngLmd, has made
this Dedication more proper to you
than any odier Perfon. Such a Bene-

iicence



Dedication} V?

licence is an Argument how thorowly
ypu defire that the Docflrines of the
GofpeV and the Purity of Difcipline^.
may be tranfmitted to future GeAe-
rations. And certainly, it is the no-
bleft, and the moft divine Application
of your Charity, when by it you are'^
a Fei/ozV'helper to the Trutk This is
given to thofe from whom you can
have no Expectation of Recompence ;
but as it's all done to the Lord, and
not unto Men, fo by him it will be re-
member d at the Rejurredion of the
Jufi. You know how much it is
againft my Temper to give fiattering^
Words, and Tm con vine d that it is
againft yours to receive em. But I
have reafon to think, that the Reverend
Author, and the whole Country where
God has placed him, will believe this
Dedication well direded, to the BEST
of all their Benefacflors. This Admi-
nijlration of Service is abundant, by
many T^hankfgivings to God, {ivhilfl by
this Minijiration, they glorify God for
your profefsd Subje^fwn to the Gofpel

r of



vi Dedication.

of Chrtji, and for your liberal Diftri-
iution to them and to all Men) and by
thetr Prayer for you.

1 have no more to add, but the
Apoftles Wifti, that your Faith may
grow exceedingly., and your Charity
daily abound) tnat whatever you do,
may be done faithfully to the Bre-
thren^ and to Strangers.



I am,

SIR,

t-ondon, *

Sept. 22* I

ijao. Your Smcere Friend,

and Obedient Servant,



Tho. Bradbury.



[ vii ]

An INDEX.

THE InmduBion. ' '^ \ . ~ „„_- ,

Of the Light, P^^^ I

Of the Stars, * — ,fi

Of the Fixed Stars, ■ ,„

Of the Sun, J '?

0/ Saturn, . ,*

0/ Jupiter. — _ f*

0/ Venus, _ ^7

S^Sr - "^ - .n - •''^''•

Of Heat, ___ .^^ 41

Of the Moon, ^1

Of the Rain, 47

Of the Rainbmi, — ^*

Of the Snow, , 54

Of the Hail, ., ^*

Of Thunder and Lirhtninr, ^,

Ofthe^ir, — ^ _ 5l

OfthelVind, y

Of the Cold, Y

Of the Terraqueous Globe, „ Z*

Of Gravity, _,,^__ Z '

Of the Water, %i

Of the Earth, ^••

OfMagnetifm, . ,'*

Of Minerals, ;°1

Of Vegetables, . ][%

Of Infers, "f

Of Reptiles, «_^ \f

OftheFiihes, \f

Of the Feather' d Kind, . yJ

Of the Quadrupeds, ,„a

Of Mart, T=. —_ r^ \f.



h /C. <? J^tdy PuUifl)\L

TH E NcccfTity of contending for RcvcaJed Re-
ligion ; witii a Sermon on the 5th oi November^
17 ip. By the Reverend Mr. TJmnas Bradbury. With a
Letter from the Reverend Qjtton Mather D. D. on the
late Difpures about The E\cr-Blefred Trinity. Pr, i s.
' The DoArine of the Blcflbd 7>imty iflated and de-
fended, by fome London Miniders. (the Introdudion
by the Reverend Mr. fvng. Chap. I. by the Reve-
rend Mr. Robinfvn. Ciap. II: by the Reverend Mr.
Smith. Chiip. Ill: by the Reverend Mr. Reynolds) The
Second Edition. Prke is. 6 d.
' A Difcourfe concerning the "Neceflity of believing
the Doftrin^ of the Holy Trinity, as profeft'd an^
tnaincain'd by the Ciurch of England in the hrft of the
^9 Articles of Reltgion. By the Reverend Mr. Samuel
Mathe-r. Price' is.

A Difcourfe concerning the Godhead of the Holy
Gho/1, the Third' Fcrfon in the Eternal Trinity.:
X^herein the Sentiments of Dr. Clark ate confidered.
By the Reverend Mr. Samuel Mather. Price 2 s.

Hymns and Spiritu:il Songs. In three Books. By
the Reverend Mr. Simvn Brovone. With a Set of Tune^^
irr thre^ ?arts, curioufly engraven on Copper-Plates.'^
'v A Collection of the Promifcs of Scripture, under
their proper Hrads. In two Parts. With an Intro-
rfuftion by the Reverend Mf. Snmuel Clark.

The OccaTIoiial Papers. In three Volumes ; Being
ElTays on \arious Subjects and Occa(ions.
'- The Family Inftrudor. In two Volumes.
•r- Memoirs ot'the Church of Scotland in four Periods.

' All Printed for Fman. MATrin-ws, at the Bible in
Pater- Nifier-Rozv ; where Subfcriptions are taken in,
^&r printing a Pnicftical Expolition of the Old and New
Tduiment, in Six Volumes in Folio, written by the
tit^ I^-verend ^fr. Matthr^u Kcnryy Miniftcr of the
Gf^fpcT : which is now In the Prefs, and will fpeedily
be publiHiM.

THE



(O




THE



INTRODUCTION.




HE ESSAYS now before us wiil dcmoi>-
ftrate, that Philofo}^hy is no En^my^ but a
mighty and wondrous Incentive to Reli^
gion ; and they will exhibit that Philoso-
phical Religion, which will carry with
it a moft fenfible ClmraBer, and vidorious Evidei e ot a
reafonahk Service. GLORY TO GOD IN THE rlGH-
EST, B^nd GOOD-WILL TOWARDS MEN, an: nared
and exercifed ; and a Spirit of Devotion and oj' Charity
inflamed, in fuch Methods as are offered in thcfe £/-
faysy cannot but be attended with more Ben-fits, than
any Pen of ours can declare, or any Mind conceive.

In the Difpojitions and Refottitions of Piety thus en-
kindled, a Man moft effedually {I^eu^s himfelf a Man,
and with unutterable Satisfaction anfwers the grand
End of his Being, which is^ To glorify GOD. He
difcharges alfo the Office of a Priefl for the Creation,
under the Influences of an admirable Saviour, and
therein afferts and aflures his Title unto that Priefl"

B koody



2 The Introdu^ion.

hood which the Blclledncls ot the future State will very
much conlift in bcin*^ advanced to. The whole
IVorld is indeed a temple of GOD, built ^x\(^ fitted by
that Almighty ^chitech and in this Temple, ew cry
luch one, aticding himfell: with the Occafions for it,
will fpeak of Hii Glory. He will alto rile into that
SuPei'iow iVay ot T^hinking and ot Living, which the
lVif4 of Men will chufe to take; which the more
p.l'te Part of Mankind, and the Honourable of the Earth,
svillclleem it no DiHioiiour for them to be acquainted
with. Upon that Palla^e occurring in the beft ot
Bookb, Te Sons of the Mighty, nfcribe unto the Lord Glory
and Stre igth ; it is a Glo'ls and an Hint of Munfler,
which carries with it a Cogency : Nihil eft tarn fub-
• rna^^nificum, quod non tevieatur liudare <7
) urn Crearpr^i ,fmm. Behold, a Religion,
\ ,lt b found '^//M/f Comroverfy; ix Religion,

\vl)Kh %vill challenge all poffible Regards from the
High, as well s the low, among the People ; I will
Tcfumc tlic M>' , a Philosophical Religion : And

yet^. V - -//

I, ^ , this Intention, and in introducing al-

moft e'-rry Aiidt of it, the Reader will continually
find * * ^hor 01 other quoted. This conftant Me-
thod ( -f , 'ti > to be hoped, will not be cenfured,
as procci > » Ambition to intimate and boafi a
Learnings ^.Mi■.i. i. . MelTiairs dii Port- Royal have re-
buked; '^nd tlyit I '.e Humour for \y\\\c\\ Auftin re-
proachc' v :11 not be found in it : Qids hac au-
dial, tJ y..:. ../^ iwwimwi ftrepitu tei-reatur, fi eft ine)'^idi-
tu(, qualis eft hot.-^hium muhituJo, & exiftimet te aUquem
magnum qui hat JKive fotueriif Nor will there be dif-
ccrnible any Spicc of the impertinent \^anity, w^hich
f.aBiuyere hath fo well fatirized : ' HeiiUus v,'\\\ always
' Cite, whether he fpeak ^ or writes. He makes the

* Prhtce of PluhfopL-vs to fav, 'Timt If^ine inebriates ; and

* the Roman Orator, 'That IVater tempo'ates it. It he
-* talks of Morality, it is not he, but the Divine Plato^

' who



The IntroduBiom ^

* who afSrms, T'/.at Virtue is amiable^ and Vice odious,

* The mofl common and trivial things, which he him-

* felf is able to think of, are afcribed by him to Latin
' and Greek Authors." But in thefe Quotations^ there
has been propofed, firft, a due Gratitude unto thofe,
who have been my InflruElors ', and indeed, fometking
nvithin me would have led me to it, if Pliny.^ \yho is
one of them, had not given me a Rule ; Ingenuum efi
frofiteri fer quos frofeceris. It appears alfo but a piece
of Juftice, that the Names of thofe whom the Great
GOD has diftingui filed, by employing them to make
thofe Difcoveries^ which are here colleded, fhould liv^
and fliine in every fuch Colledion. Among th^fe, let
it be known, that there are efpecially Two, unto
whon) I have been more indebted, than unto many
others ; the Induftrious Mr. Ray, and the Inquilitive
Mr. Derham ; Fratrum duke par : upon whom, in di-
vers Paragraphs of this Rhapfody, I have had very much
of my Subfiftence ; (I hope without doing the part of
a Fidentinus upon them) and I give thanks to Heavea
for them.

''Tis true, fome Scores of other Philofophers have
been confulted on this Occafion ; but an Induftry fo
applied, has in it very little to befpeak any Praifes for
him that has ufed it : He earneftly renounces them,
and follicits, that not only he^ but the Greater Men,
who have been his Teachers, may difappear before the
Glorious GOD, whom thefe EJfays are all written to
reprefent as ivorthy to be praifed, and by whofe Grace we
are what we are ; nor have we any thing but what we
have received from Him.

A confiderable Body of Men (if the Janfenifls may
now be thought fo) in France, have learnt of Monfieur
Pafcal, to denote themfelves by the French Imperfonal
Particle On j and it was his opinion, tliat an bonefl
Man Ihould not be fond of naming himfelf, or uilng
the word I, and Me ; that Chriftian Piety will annihi-

B 2 late



4 T^e Inlrodu6imh

late our I, and Me, and Human Civility will fupprcfs
it, and conceal it.

Moil certainly there can be very little Pretence to
an I, or Me, for what is done in thcfe EJfays, 'Tis
done^ and entirely, by the Hdp of God : This is all that
can be pretended to.

There is very little, that may be faid, really to be
performed by the Hand that is now writing ; but on-
ly the Dfjotitriary Part of thcfe E/fuys, tho they are
not altogether dcilitute of American Communications :
And if the Virtuofo's^ and all the Genuine Pinhjofhers of
our Age, ha\'e appro\ ed the Defign of the devout
Ray and Df rham, and others, in their Treat ifes ; it
cannot be diflafteful unto them, to fee what was more
generally hinted at by thcfe Excellent Pcrfons, here more
farticiikirly can'ied on^ and the more fpecial Flights of
the true Philosophical Rlligion exemplified. Nor
will they that value the Elfays of the memorable An-
tients, Theodoret, and Naz,ianz.tit^ and Anibrofe^ upon
the Works of the fix Days, count it a Fault, if among
ieflcr Men in our Days, there be found thofe who fay.
Let me run after them. 1 remember, when we read,
Praife is comely for the Upright , it is urged bv Kimchi,
that the Word which we render comely, fignines dtfrn-
lie, and acceptable ; and the Senfe of that Sentence is,
that Qt4i reEii ftmt, aliud nilil defideram quam l.audem &
Glorium Dei, Sure I am, fuch Effays as thefe, to ob-
ferve, and proclaim, and publifh the Praifes of the
Glorious GOD, will be dcfirable and acceptable to all
that ha\ e a rigl)t Spirit in rhem ; the refi, who arc blind-
ed, are Fools, and unregardable : As little to be re-
garded as a Morfle^ flourifhing a Broomjiick ! Vtx silts
optari qui dquam pejus poteji^ quam ttt fatuitate fua fruath-
tur. For fuch Centaurs to be found in the Tents of
profellcd Chyijiianity I — Good God, uttto what 'Times haft
thou referz'td us ! If the Jclftat4<^ht J'hilvfopher will not,
\tx: Ahubektr^ a Alalomttan Writer, by whom fuch an
one y^iis exhibited mure than i{\c hundred Years ago,

will



T^he Introdu£iion. 5

will rije nf in the'Judgmem with this Gene^'ation^ and con-
demn it. Reader, even a Mahometan will fiiew thee
one, without any 'Teacher^ but Reafon in a ferious View
of Nature, led on to the Acknowledgment of a Glo-
rious GOD. Of a Man, fuppofed as but ufing his
Rational Faculties in viewing the Works of GOD, e-
ven the Mahometan will tell thee ; ' There appeared
' unto him thofe Footfteps of Wifdom and VVonders
in the Works of Creation, which affeded his Mind
with an cxcefTive Admiration ; and he became here-
by aflured, that all thefe things muft proceed from
fuch a Voluntary Agent as was infinitely perfe^, yea,
above all Perfedion : fuch an one to whom the
Weight of the leafl Atom was not unknown, whe-
ther in Heaven or Earth. Upon his viewing of the
Greatures, whatever Excellency he found of any kind,
he concluded, it muft needs proceed from the In-
fluence of that Voluntary Agent^ fo illuftriouQy glo-
rious, the Fountain of Being, and of Working. He
knew therefore, that whatfoever Excellencies were
by Nature in Him, were by fo much the greater, the
more perfect, and the more lafting ,* and that there
was no proportion between thofe Excellencies which
were in Him, and thofe which were found in the
Creatures, He difcerned alfo, by the virtue of that
more Noble Part of his, whereby he knew the ne-
cejfarily exiflent Being, that there was in him a cer-
tain Refemblance thereof: And he faw, that it w^as
his Duty to labour by all manner of Means, how
he might obtain the Properties of that Being, put on
His Qualities, and imitate His Anions ; to be diligent
and careful alfo in promoting His Will; to commit
all his Affairs unto Him, and heartily to acquiefce
in all thofe Decrees of His which concerned him, ei-
ther from within, or from w^ithout : fo that he plea-
fed himfelf in Him, tho he fliould affliEi him, and
even defiroy him/ I was going to fay, Mentis nu-
e^ Verla braUeata ! But the Great Alfied inftruds me,

B 3 that



5 'The Jntrohcilon.

that we Chnftiam, in our xaluablc Citations from them
r!- Stringer to a.p.un, (hould fcze u,on the
Stences as contai.iing o«r 7'r«tk, detained in the
hands of Vnjufl P.0o.-. : and he allows me to fav
S e ClJnU qufn, Natura docuit. Ho^vc^•cr, th,S
I mav lav God I J thus fur taught a Mahometan ! And
thTs I Si fay. ClrijlJt, be^varc left a Mahom.'.an be
rqlV'd in tor thv Condemnation ! ^ , . r- r

Let us conclude with a Remark a( Minutrus F.hx.^
' If fo much W'lfdom and Penetration be rcquilite to
' otferve the wonderful Order and DeHgn m the Stmc-
' ture of the World, how much more ^vere nocellary
' Tfim it ! ' If Men fo much admire ? ;lf Ph"^'
becaufe they difco-ver a fmall Part ot the IV'fdom tha
made all things; they mull be Rark blind, who do not
admire that Ulfdom itfclf !




Rei



(7)




ReLIGIO PhILOSOPHICA;



OR, THE

Chriftian Philofopher :

BEING

A Commentary, of the more Modern
and Certain Philosophy, upon
that Inftrud:ion,

Job xxxvi. 24.

Remeniber that thou magnify His Worh which

Men lehold.

HE Works of the Glorious GOD in the
Creation of the World, are what I now
propofe to exhibit ; in brief EJfays to enu-
merate fome of them, that He may be glo-
rified in them : And indeed my EJfays may
pretend unto no more than fo??ie of them ; for, T'heophiliis
writing, of the Creation^ to his Friend Amolycus, might
very juflly fay. That if he fhould have a T^hcufand
Tongues^ and li\'e a Tlmifand Years ^ yet he were not

B 4 able




8 ^^e Chrifiian Philojopher.

able to dcfcribe the admirable Order ot the Creation,

'Trcnficndtnt Greatmfs cf God, and the Riches of his M/tf-

dom appearing in it !

Chryfoftont, I remember, mentions a Twofold Bock of
GOD; the Book of the Creatures^ and the Book of
the Scriptures: GOD having taught firll of all us
J)d /©e^foATar, by his IVorks^ did it afterwards J^j^ yi^i^'
(jmIuv, by his IVords. VVc v ill now for a while read
the Former of thcle Books, 'twill help us in reading the
Latter-. They will admirably aflTill one another. The
Philofopher being asked, What his Books were ; an-
fwcred, T*otius Entis Naturalis Vnivevfitas. All Men
are accommodated with that Publick Uhrary. Reader,
walk with me into it, and fee what we fliall nnd fo
legible there, that he that runs may read it. Behold, a
Book, whereof we may agreeably enough ufe the
words of honeft ^gardus \ LeBu hie oinnibus facilis, etfi
nunquam legere diditerint, & communis ejl omnibus, omni-
amque octilis expc/tus.

ESSAY I. 6/ the Light.

WOULD it not be proper, in the firft place, to
lay down thofe Laws of Nature, by which the
Material IVorld is go\ erncd, and which, when w^
come to conlidcr, we ha\e in the Rank oi SccnidCaufes,
no further to go ? All Mechanic^ Accounts are at an
end ; we flep into the Glorious GOD Immediately :
The very next Thi>2g we ha\e to do, is to Acknow-
ledge Him, whp is the Firft Cauf^ of all : and the
Christian Philosopher will on all Invitations make
the Acknowledgments. The acute Pen of Dr. Cheyne has
thus delivered them.

I. AW Bodief perfevcre in the fame Stare of Rtfly or
of .Vfov/;/,^ forwards in a fh ait Line, unlcfs forced out
of that State, by fome Valence outwarqly ipiprc;lVcd
upon tlicm.

II. The



7h Chrijiian Philofopber. 9

II. The Changes made in the Motions of Bodies, are
always proportional to the Imfreffed Force that moves
them ; and are produced in the fame DireBion with
that of the Moving Force.

III. l^ht fame Force with which one Body ftrikes an-
other, is returned upon the firll by that other ', but
thefe Forces are imprefled by contrary DireEiions.

IV. Enjery Part of every Body attracts or gravitates
towards every Part of every other Body : But the Force
by which one Part attrads another, in different Di-
(lances from it, is reciprocally as the Squares of thofe
DiAances ; and at the fame Diflance, the Force of the
Attradion or Gravitation of one Part towards divers
others, is as the Quantity of Matter they contain.

Thefe are Laws of the Great GOD, who formed all
things. GOD is ever to be feen in thefe E,verlafiing
Ordinances. But now, in proceeding to magnify that
Work of God which Men behold^ it feems proper to begin
with that by which it is that we Behold the reft.

The Light calls firft for our Contemplation. A
moft marvellous Creature, whereof the Great GOD
is the Father :

lUic incipit DEUM nojfe.

The Verus Chrijlianif??ius of the pious John Arndt ve-
ry well does infill upon that Strain of Piety i GOD
and His LOVE exhibited in the Light,

It was demanded. In what Place is the Light contain-^
ed? By what Way is the Light divided?

Ariflotle's Definition of Light ; *«$ gr/f h hiffuat. t« Jiar
(p««r« f , Light is in the Inworking of a Diaphanous Body , is
worth an attentive Confideration.

Light is undoubtedly produced, as Dr. Hook judges,
by a Motion, quick and vibrative.

It is proved by Mr. MolynenXy That Light is a Body.
Its RefraSlion, in pafling thro a Diaphanous Body, fhcws
|:hat it finds a different Rejiftance j Reftflance mull pro-
jceed from a Contact of two Bodies, Moreo\'cr, it re-
quires



10 T'he Chrijlian Philofopher.

quires T/w^ to pafs from one place to another, tho it
has indeed the quickeft of all Motions. Finally, it
cannot by any means be increafed or diminijhed. If you
inaeaje it, it is by robbing it of fome other part of
the Medium which it would have occupied, or by
bringing the Light ^ that fhould naturally have been
diffufcd thro.fome other PLice, into that which is now
more enlightened.

Sir Ifaac Neuton ']\XilgtSy 'Tis probable, that Bodies
and Light aft mutually on one another. Bodies upon
Light ^ in emitting it, and rcHedting it, and refracting
it, and inflefting it : Light upon Bodies^ by heating
them, and putting their Parts into a Vibrating Motion.

All Hypvthefes of Light arc too dark, which try to
c^cplain the PhjncTnena by Ne-w Mcdifications of Rays ;
they depend not on any fuch Modifications, but on
fome Congenite and Unchangeable Properties, eflentially
inherent in the Rays.

The Rays of Light arc certainly little Particles, adu-
ally emitted from the Lucent Body, and refracted by
fome AnraHiony by which Light, and the Bodies on
which it falls, do mutually act upon one another. It
is evident. That as Rays pafs by the Edges of Bodies,
they are incuri'attd by the Action of thcfc Bodies^ as
they pafs by them.

And it is now perceived, That Bodies draw Light,
and this Light puts Bodies into Htat : And that the
Motion of Light is therefore f\K ifter in Bodies, than in
vattw, bccaiife of this Attraction ; and llower after
its being nfiicJed, than in its Incidence.

Irradiated by the Difcovcrics of the Great Sir Jfaac
Nirvi'tovy we now underhand. That every /^i^jr of Z/^/'f
!S enc()\vcd with its ovn Cohtn; and its J'tierent De-
gree ri Rifriihgitility and Repxiuiiity. Que Ray is/^-
vltt, another kdigo, a third Blue, a fourth Green, a fifth
]\ro'v, a lixth O^diJge, and the lall Red. All thcfe are
0,:gi»^^d Cv'o- '>\ and from the Mixture of thefc, all the
intc; ^ proceed; and /f'^o//^ from an cqu



The Chrifiian Philofofher. i r

ble Mixture of the whole : Blackj on the contrary,
from the fmall Quantity of any of them reflefted, or
all of them in a great meafure fuffocated. It is not
Bodies that are colouredy but the Light that falls upon
them ; and their Colours afife from tht Aptitude in them,
to refiecl Rays of one Colour, and to tranfmit all thof^
of another. *Tis now decided, No Colour in the dark!

Tho Light be certainly a Body, it is almoft impofli-
ble to conceive how fmall the Corpufcles of it are.
Dr. Cheyne illuftrates it w^ith an Experiment, That it
may be propagated from innumerable different Lumi-
nous Bodies, without any confiderable Oppolition to
one another. Their feveral Streams of Light will be
together tranfmitted into a dark Place, thro the lead
Orifice in the World Suppofe a Plate of Metal, hav-
ing at the top the fmalleft Hole that can be made,
were erefted perpendicularly upon an Horiz,ontal Plartey
and about it were fet numberlefs luminous Objeds of
about the fame Height with the Plate, at an ordinary
Diflance from it j the Light proceeding from every one
of thefe Objects, will be propagated thro this Hole,
without interfering.

Mr. Romer, from his accurate Obfervations of the
Eclipfes on the Satellits of 'Jupiter, their Immerfions and
Emerfions, thinks he has demonftrated. That Light re-
quires one Second of Time to move 9000 Miles. He
ftiews, that the Rays of Light require ten Minutes of
Time to pafs from the Sun to us. And yet Mr- ^i^^^»^
hath fhewn. That a Bullet from a Cannon, without a-
bating its firfl; Velocity, would be 25 Years paffing
from us to the Sun. So that the Motion of Light is
above a million times fwifter than that of a Cannon-
Ball ; yea, we may carry the Matter further than fo.

We fuppofe the Diflance of the Sun from the Earth
to be 1 2000 Diameters of the Earth, or fuppofe loooo,
the Light then runs 1000 Diameters in a J^. re;
which is at lead 130,000 Miles in a Second. T>v.C:Jtyne

(hews.



1 1 The Chriflian Philofopher.

{hews, That Light is about Cix hundred thoufand times
more I'witt than Sound. Amazing Velocity !

To chequer the Surprize at fo fiv/ft a Motion, I
may propound one that fliall be as very furprizingly
flo-vj. Dee affirms, that he and Cardan together faw
an Infirument, in which there was one Wheel con-
flantly moving with the reft, and yet would not finidi
Its Revolution under the fpace of feven thoufand Years.
Tis eafy to conceive with Stevinus, an Engine with
twelve Wheels, and the Handle of fuch an Engine to
be turned about 4000 times in an Hour, (which is as
often as a Man's Pulfe does beat) yet in ten Years
time the Weight at the Bottom would not move near
fo much as an Hair's Breadth : And as Merfemius notes,



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