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# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
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Secondary Prantos.
Cs. Sec the Words
Thacthe Cause oF the Secondary Licht of the
Moon; a5 the) calI it; thac is, the obscure PaKE O)
her, appearins dike kindied AMes, juR DetOrC
and aster the Charise or Nem Moon, is the Suns
Rays reflected From the brighe Flemisphere o
the Farch to rhose dark Parrs oF the Moon, anc
The Plane ot che Moons Orbit is enclined ro
char of the bcliprick, and makes with iE an AN
sle ot abour s degrees. Grez. Astron. And chis
Oeclination raries; and is grearest artien the
Moon is in he Cuadratures, and least viton Me
is in hex Sy2Y 5Y5.
By means ot the Spors in theMoon, (wtich
Fevelius, Grimaldus, and Ricciolus, Sare Names rO
thence 2gain redected ro che FParrh destirure OE che Lunar Cclipses. are moreaccuratels observec
che Suns Lighe; sec proved in Zucchius Philo-
Soph. Optic. Nov. trom p. 247 10 P. 260. And alse
in TacquetS Opera Ceometrica.
ThC E.KCellenE MT. Nemion makes it a PFOPO
sicion ro enquire into che Fisure of che MOOn
and supposins, ic, at ies Arst Original, tohave
been a Fiuid, litce to our Sea, he calculates rhar
the Attraction ot our Farch vould raiseche Wa
ter there tO near 90 FOOchish, 25 the AFTractIOK
oF the Moon raiseth OUF WWaLEK LO LZ FOOL
Whenceche Fioure ot theMoon must be a Sphe
rhoid, Wohose greatest Diamerer extended, tvil
Pals chroush che Cenere of our Farth; and vil
be lonser chan the ocher Diamerer perpendicular
tO it, Or 18O Fcer. And Erom hence ic comes
opals that we sec alvars che same Face oF rho
MoOn: For Bne cannor relt in ans other Polition.
Due ill continually endearour eo contorm her
selF Eo this Situation. Prop. 38. L ib. 3.
The Moonhach proxerly no Atmolphere, luet
as our Farth hach, abounding with Clouds. Winds
Thunder, or Liglining; because her Face al-
rayo (wvhen our dir is clear) appears distinct
arid clear; and by our Pelelcopes we can sec
the Suns Lighe pals regularty and uniformi
From one Mountainons Place to another.
MI. Flamsteed, in Philosoph. Trans. N. 154
Caith, thac the best Pables oF the MoonS MO-
tions do exr r2 Minures, Ox more, in her APP2
rent Place; wrtich causes a Faulc oF TTaIF an
FTour, Or 7 : Degrees ot che Lonsitude of Pla
ces endearoured to be found out by her.
M. Azout lays, chac chis llanetsBrameter ne
ver appeard to him abore 33 min. and never
le(s Ftan 24 HIMILCS 45 ICCBIS.
MIT. NemtOn FCCLONS The MCan BTaCTEE O
the Moon t0 DC 32 minutes 12 Scconds, a5 chC
SunS is 3P minures 27 scconds.
ala Densier oF che Moon he conciudes to be
tO chac oF che Fartl, 259 105 neartr: And Fhac
The NTa(S Or Ouanity OF Macter in the MOOn tO
chat ot elle Parch, 15 a5 1 10 26 BeartY.
Lhe Famons Dr. WVallis aorees With Des Car-
Than FOrmerIY; tD the GreaE AdrancemenE ob
Gcorraphy and Navisation, in Peclins che Lonoi
cudes oF Places: For the Immersions and Emer
sions of chele Spors from the Stracow ot che
Farch, are most nicelr derermined.
Altho the Moons Period round he Larch De
in 27 D2y5, 7 Flours, = oC an Hour, (artrich is
the Periodicat Month) Vet because in the Space
ot a PeriodicalMonth, che Farch also, with ils
Sacellire, the Moon, is moved on amost an en-
rire Sign, in Consequentia; iherelore the POInE
ot che Moons Orbir, in the last Conjunction,
et New Noon, will be soeen t00 Car ro the
Wrestrard: And cheretore the MoOn CannOE
come vet t0 a nem Conjunction wirh thie Sun
but Wans OF ic 2 DarS and S FTours; Wvhich
must be past betore the enrire Lunation will DC
over, and betore che Moon hath exhibired alt
her Phases. These 2 D 275 and 5 FIOurS There-
For: beins added ro the Periodical Moneh, make
the Synodical one, wrhich consists oF 29D275,
12 Flours, and a OF an FIOUF.
MI. Flamsteed makes che Lunar Periodicat
Month eo bC 27 d275, 7 hourS, 13 minaces, 7 se-
conds; a5, on Enguiry, he asured me.
The ocher Sccondarr Planers move svitret
round cheir Axes than che MoOn; For her (25
theFarchS) uniform Rerolution round her AXIS
is just the Fime ot her Periodical Monch abore
mencioned: Erhich is che ReaTOn chac MC aI
ars obrerts the Tame Face roards us, allou-
ins a litele For chat Morion oF hers Which they
Callher Librarion. Sec Fvection and Libration.
The Axis oF this Morion is alivars parallel ro
ies sels, and therefore cannor be ae Kishe Angles
Woich the Piane of che Moons Orbir, (For This.
by reaton ot the Suns Perrurbation oF her MO-
tion, is conrinually chanoino) but is enclined r0
ic, and is almost ac Rishr Angles with the un-
Chanseabie Plane of the Fcliprick.
Tho the Moon, a5 well as the Parrh, and pro-
bably allche P’anets De of a Figure Oblately Sphe-
roidical, (chac is, havins its Diameter ac rhe F
Quator longer than iES AXIS) Vet the ExCelS OF
MOOn appeaES EO our common Sighe (0 much rhe Equatorial Diametet in her, is lo inconside
bioger Wvhen near che Horizon, chan che dorh
d. tr cs. ld. 161.
rable, char he mas vellenoush pals for a Clobe;
and perhapschis neariy Spherical Fisure oF che
round her Aris: FOr Fupirer, Which moves he
more Oblate chan any orher Planet d
IF any Fiye ivere placed in cheMoon, ic vould
judse chac che Sur, the Farch, and che ocher
PtanEES, EOSCIHCK WTCH IHC HL d OCaTS, dia move
From KAC LO West on the Poles oF che Reliprick
in a Periodical Month, becaule in thac lpace ob
Time, che Hoon curns round her Aris; and
markable and conspicuous; for che Norrta Pole
rould be near a Star oE chetourch Lighe, in rhe
chisd Flexure ot Braco, votica noula be buc
ehres
12 Seconds inthe Duadra
ertien near the Meridian; tho Me be (near HY)
one Semi caeles e C Las iSHes o us in Moon, may be the retule ot her Nous morion
the Laetet Cale, than in the LOet. M 1o
Lhac ene Trorizontal Moon is capable of being svitcest of anx round its Aris, is oF a Figure
compared mith mans interrenins Obiects, Inter
posed Hlillo Cc. Bur the Meridional Moon hach
iotue o De compared withal; aud theretore
che Distance becreen us and her, is judged 10
Dc Vastly Freater, than when Me is in the L0.
r1ZOr. IIC Cays ic cannor be ac all trom the RC.
traction et Vapours vear che Hlorizon, becaule
ETaL can only encrease che AIitnde oF her, bur chese Poles ot the Ecliprick would De very re
NOE her AZimEH OF BreadEM; For the HTOriZON,
in die ratote, vouel atraso be loct ac eti esi