'182

PlateLVIII.PI. LX.

Fi g- 3'

PI. LX.f'g- *•

Ast.r QNO m y.

Pole, and all the Parallels of Latitude

yided into two equal Parts by the

tuu.Circk 9tW‘

Illumine

, their Presence wi]] be shorter than that of their

or the Day will be shorter thah the Night; . aS ft,Southern'Tropic the Day is L X, but the Nffh^

longer by the Difference .M X ; vyhich Dift ese ‘^ $still greater the farther you go, till you

Antarftic (Circle def where there is no Day at

come £ 'J

all within to the South Pole 8 is involved in N*S ;greater or less Duration. . ■ ■ ■ - ’ rf j^ s

ii. For the same Reason?,, when the Earthto the opposite Part of its Orbit, it will be S w t ]yC

to all, the Southern Climates, and Winte?.Northern. It is evident this must necessarily h^P^ o-

- -* -»»- +'•> LUiO -UXUIL u^wwuufj.^ - *

the Parallelism of the Earthy Axis, and the Ch aI, =.

<d

her Place in the Orbit:

stO

illumines that very Half of the Globe which'

By which Means the t f>e

other Position was darkin all North Latitudes the Length of the Daysequal to the Length of the Nights then, and r 0 s ^ e \ ofin South Latitudes. Thus the Day (in the P^/gti<England) EZ ~DZ, the Night in the Summerand the Night now, viz. ZD = ZE, the Das aTime. All which Things are too plain * s0 'Schemes to want farther Explication. c .{bst 5 *

12.. Thus the Vicissitudes and Variety of the b ^ tfand of the Day and Night, appear in general; ^ ( ti-

exhibit the fame in an especial Manner forcular Place, as London , another Scheme is. 11 . 6 n v/i (t

" " Wof

wherein the Sphere shall have the same Posipo^^respect to that Place, as the Earth itself has. o>

Æ N QjS be the Earth; - Z will be the highest P°Place of London ; H O the Horizon, and N t '£- ' ,rt

Point or Antipodes, and Æ Q_the Equator, -q^c^ 5 ’P L the two Tropics, a c and d f the two P° -as before.

*3

tjrtll K

Then when the Sun is in the Plane of t-st

tor at e, the Semi-diurnal Arch , or half the L 0 {£;the Day, will be represented by Æ C; and t t piNight by C Qj which is eqyal to the former.