2J2

PI. LXV.k'L- 7-

¥he Use of the Globes*

the

&

Find the Day of the Month i stIendar on the Horizon, and right 3 & ^it is the Degree of the Ecliptic wh lC

Sun is in for that Day.

0$

still pass through the Center of the Plane N?lower SemiaxisHour-Lines on

• j ¥.ark ° U V

N S will by its Shadow )nal f e iipPy,the Southern Surface, and 1 r sl> e ‘

Semiaxis N P will do the fame on the Northern’ g

Hour-Lines are determined in the fame

. , - n t¥ U

those on the Horizontal Dial; and it is plain?

the Southern Face of this jji (nor Urine on it after

cannot come onSix in the Morning,Evening-.

21. Also it is evident,

that all the Hours

in the Morning, and after Six at Night, win ^ t>on the Northern Face or Side of this Plan e ’ ^ sLTime of the Sun’s being above the ^- oX s sis 1 *ftPlace. Hence, the Reason of a Direst ^ out s c \i i s ^5*Vertical Dial easily appears; the latter os'W^ () <represented apart from the Sphere, with its se c °Substyle, and Hour-Lines : And the fame m a ; .ceived for a North Er est Dial. g jl ” ^

22. The Gnomon N S contains an Angl e * jZ N P with the Meridian or Hour-Line 0 f.W a

Z D, which is exactly the Complement of * 0 lP N B to 90 Degrees ; or the Elevation of *is in these equal to the Complement of the Dthe Place : And what has been said about <£, 0 °,^of the Hour-Lines is the fame for the B ^ J )' 1 ^Likewise if the Rationale 0 ,-Æc tl {,r <

„ 6 .... be

understand of a Dial which does not face tNorth-directly, but declines therefrom any ^ e y ^Degrees towards the Fast cr West. 11^

would know more of the Mathematical yt- yjfpCalculations for all Sorts of Dials, may nzV - Jto the Second Volume of my h/laihetnal 1

TUTES.

Quarters, &c.

South Dial be understood, nothing can