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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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Sorous; and etie L
ides by eic Equinoctial
Moon, and cheretore are cheAtronger
Fence ic hiappens, chac chie Ditterence betrcet
etic sprinc and Neaptides, in chese Monctis, is mul
lels considetable chan in March and September
And che Reason wrhy etie tighest spring sides
are Poune
Co be racher betore che Vernal; and atter
ihc numnal Equinox; viz. in February and Oet0
ber, than precisely upon chiem, is, becaule che sun
is nearer elte Larrk in etie Winter MMKhS, and sC
Non by che Hyporhesis il is erident, chal l
Nater in Z, Deins nearex, is mOr CdWn
Moon, thanthe Cencer oF che Farth C, and chal;
pam more chan che Watet I LI, CMCtCIOC MH
Wacer in Z, has a cendeney cowards che Moon
contrdry ro chac ot Gravier, beins equal to cho
Fixcels ot che Graritation in Z, abore char in. C:
And m che ocher case, the WVacer in N cendine les
corvards he Noon than ehe Cenrre C, Wvill be
dels press d, by 25 much as is che Disterence b1
hie Glaritations rorard che Moon in C and in N
This riphely understood, ic Follows plaintr, chaF
the Sed, Wrhich ocherwise ould be Spticrical, up
on the Pressure of che Moon, must Form ir se IH into
a Spheloidal, or Oral Figure, whose longest Dia-
metet is Where the Moon is Verrical, and Morcest
Wohere (he is in the Horizon; and chac the Moor
Pitittis her Polrion, a5 he curns round che Fariti
once a Day, this Oral oF Wacer Citis wich hel
occattetins chereby rhervo floods and Ebbs O
serrable in cach 25 FTOurs.
Andchis may suftice asto the general Cause ol
the Tides: Ir remains non ro theu hou nacurally
chis Mocion accounes FOr aII che Parriculars haL
Hare been obserred aboutthem; (0 thar there can
beno room lefr ro doube, buc chac chis is the rrue
Caule chereof.
The Sprineatides, uxon che Nem and Full Moons,
and the Neap-tides, on che Ouarrers, are occasion d
by che atcractire Force oF che Sun, in the Nem and
Full, conspirins wwich che Actraction oF che Moon
and producins a Tide by cheir uniced Forces:
whereas in che Ouarters, the sun railes che Wacer
eohere che Moon depresses ic, and on che contrarr:
1025 The Tides are made ouly by che Difference ot
cheir Atrraction.
Thatthe Torce oF che sun is no creater in ehis
case, proceeds trom che very (mall Proporrion chC
Semi diameter ot che Farrh bears 1o the vast Di
stance ol che Sun.
IE is also observed, Thar caeteris paribus, che
Equinoctial Sprins tides in March and September, Or
near them are che highest, and che Neap-tides the
lovelt; Which proceeds from che grearer Agicari-
on ofthe Warers, When che Auid Spheroid revolres
about à great Circle ot che Farrh, than when ic
curns abour in a lesser Circle; ic beins plain, char
if che Moon ivere constitured in the Pole andthere
Aood, thacche Spheroid rould have a fixr Posirion,
ane chat ic ould be alwars Frizh. mater under che
Poles, and Lom mater erery where under che Pqui-
noctial; and cheretore che nearer che Moon ap
proaches che Poles, the less is che Agirarion ot che
Ocean, Which is oF all rhe grearest, when che
Moon is in che Lquinoctial, or Farchest distane From
the Poles.
Vhence the, sun and Moon, Beine cicher con-
Let A P F P BC the Farth corered BVeL WMI
joyn d or oppolite in the Equinoctial, produce che  or belo ic.
Ereares Sprinstides; and che sublequent Neap-
tides, beins produced by che Propical Moon in the
Ouarters, are alvars ehe least Tides; whereas in
June and December, the Soring-tides are made by
he Fropicat sum and Moonus aid cherett aid 
tr
b3
comes to tiare a greacer Fffect in producing che
Tides.
Elictierto ive have considered sucti ARections OE
the Fides, as are univertal, virtioue relation to par.
ticular Cdes; Wvtiac follons trom che differins L. a
Firndes oF Places Wilt DC casily WNILKNU V ee
Follomns lisule.
very decp WVaters, C ies Centre, P P itsPOleS, AF
che Equinoctial, I fche Parallel ot Latitude oF à
Ptace, Ld anocher Parallel ac equal Dsistance ot
he other side oE the lquinoctial, HIh che civo
Lomes irhere che noon ls reccca ad sec SL
Bc the great Circle, Wherem the Moon apPedis
LlOrIZOntal
Tris erident, thac a Spheroid deleribed upon HB
andIE I2; Pail nearly represent etie Figure ot the
Sea; and C s
C D; C F, C du Mall bC che
Feighs oF the sea in the Places f; D, F, d; in 21B
ertich ic is Figh mater: And secins chac in 12
Ftours cime, by che Diurnal Roration of rhie Larth,
che Point Lis transter d ro f and d 10 D: The
fleishe oE che sea C F, will bethat of che Hish
mater, Wvhenthe Noon is Prelent, and C f chiat oF
The ocher Fish. mater, wrtien che Moon is ccet clc
Carch; which in che cale ot chis Fisure, i5 lels
chan che Former C F.
And in the opposire Parallet D d, ehe contrary
happens: The rilins oF the Warer beins alvays
alternarely ereater and less in each place, wrhen il
15 produced by che Moon declinins senlibly from che
Equinoctial; char beins the greatest oL the tvo
Fich. maters in each Diurnal Rerolurion oE che
Moon, Wherein she approaches nearest cixher cortie
Zenith or Nadir ot the Place. Wrhence ic is, thac
the noon in che Norchern Signs in ehis part of che
WVorld, makes rhe grearest Tides when abore the
Farch, and in Souchern Sions ivhen under che
Farrh; elie FRect beine alvays the grearest wtere
Ehie Moonis Farrhest trom the Foriron, cither abore
And elis alcernate increale and decreale ot ehie
Tidcs, has been oblerr d ro hotuctuc oH ine Loalt
Ot Fneland, ac Bristol bY Caprain Scurmey, an dl ac
nod cae