1000000030

henen, and (nrol1gh the

foIni;i~1

points Caneer

~nd

Ca·

r rieorn, in the ecliptie. Eaeh quarler of lhe former of

lhefe eolures is divided inro

degrecs, from rhe equi.

noéli~1

to the poles of rhe world, for Ihewing rhe dccli–

nation of rhe fun, moon, and Ilars; and eaeh quarrer of

rhe htler, from Ihe ecliptie

, and / ,

ilS poles

and

for 01ewing lhe latirude of lhe Ilm.

In Ihe nonh pole of lhe ecliplie is a nUl

la which

ii fixed one end of a quadran1al wire, and la lhe olher

cnd

fmall fun r, which is earried round lhe eoliplie

OO,

by turning lhe

out:

and in lhe fOUlh pole of lhe ecliplie

is a pi.n

on whieh is another quadranlal \Vire, Wilh a

fmall mooo

4pOD il, whieh may be moved rouDd

lry

haod: but there is a particular conlrivance for c'auGng

Ihe moon lO move in an orbit whieh crotres Ihe ecliplic

at.an

angle of

degrees, in two oppofire poiors called

Ihe

moon', nod"

;

and alfo for Olifling Ihefe poiot. back·

ward io the eeliptic, as lhe

11:0.,1',

/Joda

(bifl in Ihe hea·

ven.

Wilhin lhefe circular rings i6 a fmall terrellrial globe

fixt

an axis

KK,

which eXlends from the north

and fouth poles of the globe al

and"

lhofe of Ihe

celeltial fphere at

and

OD lhis axis is fixt Ihe nal

celellial meridian

L L,

which may be fel direélly over

tbe meridian of any place on lbe globe, and lhen turned

rouDd with the globe, fa as lO keep over lhe fame meri·

dian upon it. This aat meridian is graduated lhe fame

way as the brafs meridian of a common globe, and il!

ufe is much the rame. To this globe is .fitted tbe move.

able borizoD

M M,

fa as to turn upon two Ilroog wires

proceeding from ilS ean and wen pOiOlS to tHe globe, and

e~tering

the globe at the 9Ppalire points of its equator,

whicb is a moveable brafs f1ng lel into the globe in a

graove all arouod ilS equator. The globe may be turoed

by hand within this

~ing,

as to place any given meri–

diao upoo it, direélly under the celellial meridian

LL.

The·borizoo is di.ided into

360

degrees all around il'l

outermoll edge, Wilhio which are the points of tbe com–

paCs, for fhewing the amplirude of lhe fun and moon,

"both in degrees and points. The celellial meridian

patres lbrough two nOlches in the north and Couth poinl!

of the horizoo, as in a common globe: b.t bere, if the

~Iobe

be turned round, me horiton and meridian turo

with it. At the fouth pole of the fphere is a cirele of

hours, fixr to !he rings, aod on the axis is an index

which goes rouoo tha! cirele, if !he globe be turned

·round in axis.

The whole fabric 1S Iapported {ln

pedeOal

ana

may be e1evated or depre(fed upon the join!

to any

l1umber of degrees from

oto

90,

bymeans of the are

·which is fixed in the Ilrong braCs arm

.t,

and Oides io

the upright.piece

in.which is a Ccrew a! r, to fix it a!

~ny

proper elevation.

In lhe box

are two wheels (asin Dr Long's fphere)

God

t~·o

pinions, whofe axes come out a! 'V and

ej.

ther of which

m~y

be lurned by lhe fmall winch

When the winch is pUl upoo lhe axis

and turo back·

IVard, theterrellrial globe, IVilh ilShorizonand celellial

'1Ileridian, keep at relf; and the whole fphere of cireles

I'Jrn! round from eall, by fOUlh, to well, carrying lhe

[~o.r,

...

moon

round lbe fame way, and caufing

lhrm lOrife above and fel below the horizon. BUl whell

the winch is pUl upon Ihe axis

and turoed forward, the

fphere wi rh the fun and moon keep al

rell;

and the

tallh, with its horizon and meridian, turn round [rom

\Vell, by laulh, to e,lI; and bring the fame points of the

horizon la the fun and moon, tó whieh thefe bodies

cam~

whcn lhe eanh kept at reO, and lhey were earried round

il; fhewing lhat Ihey rife and fet in lhe fame points

al'

lhe horizon, and

:rt

the fame limes in lhe hour cirele,

whelher lhe mOlion be in the earth or in Ihe heaven. If

the earthly globe be turned, lp.e hour·index goes round

ilS hour.cirele; but if tbe .fphere be lurned, the hour–

cirel. goes round belolV tbe indexo

And fa, by lhis conOruétion, the machine is equally

Iitted to fhew either lhe real mOlion

the earth, or tbe

appareOl mQtion of lhe heaven.

To reélify lhe Cphere for ufe, firll flackeo lhe Ccrew

io lhe uptight Ilem

and takinghold ofthe arOl

.t,

move

.il up Or down uotil the given degree of latilude for aoy

place be at the fide of the Ilem

1/;

and then the axis of lhe

fpbere will be properly e1evared, fa as to {fand parallel

la rhe axis of lhe world, if lhe maehine be fel nonh and

lOulh by a[mall.compafs: lhis done, count rhe larilUde

from the Dorth pole, upon the ce/ellia! meridian

L L,

down towards lhe north ·nolch of lhe horizon, and fe!

tbe horizon. to tha\ latilude; ¡hen, turn the nUl

un·

til lhe fun reames tO the given day of Ihe year in lhe

ecliptie, aod the fun will be al its proper place for

that day: find lhe place of the mooo's afcending nade,

and alCo lhe place of the moon, by an Ephemeris, and

Cet lhem righ! accordingly : IaOly, turo the wineh

11';

until either lhe fun comes

the meridian

L L,

or until

lhe meridian comes to the Cuo (accordiog as you want lhe

fphere or earth to move)

and

Cet the hour·index to tht

XII,

marked nooo, and the whole machine will be rec–

tified.--Tben turo the wioeb,

a~d

obferve wben

Ihe' fun or moon rife and fet in the horizon, aod

the hour·iodex will fhew lhe times thereof for the given

day.

As lhofe who underlland the uCe of the globes will

lofs to work many other problems oy this Cphere,

is needlefs to enlarge any farther upon it.

Dire{fionJ for

ufillg

G ¡ohef.

ufing globes, keep Ihe eall fide of Ihe horizon to–

:\Vards you (unlefl yourproblem reqoire lhe tuming of il).

which fide you may know liy the word EaO upoo lhe

h~.

rizon; for theD yOY have lhe gtadUalC? fide of the men–

dian to\Vards you, the quadran! of alurude befare you,

and the. globe divided exaélly ioto 'two equal pam, by

!he gradualed Jide of the meridiano

·10

work;ng fome froblems,

\ViII

necetrary to tUfD

the whole globe.and horizon abour. lhal you may look on

the well fide 'thereof; which turning will be apl tO jog

Ihe hall fa, as to ¡hift away lhal degree of lhe globe

which was befare fet to the harizan or meridian: la a–

void which inconvenience, you may thrull in the feather–

end of a quill between.the

b~1I

of lhe globe and

l~e

bra·

zcn meridiao

which, withour hurting lhe ball,

11'111

kce.p