to Lecture XL

-0 It

^ 2', which added to the Time of the

I' / e Observation, gives June i x D. 20 IT.° r the Time of the Solstice.

Again, by the other three Observa-

ti

t c.

°IW

We have t — 107, d-.

92,

■d.

} a nd a ~ 4; wherefore say, As 398 :^ : : 40.- 9 6 H. : 3 H. 37 % the Disse-^ l * Ce between the ad Observation, ‘June 12,l] x Moment of the Solstice, which\y e ^ 0re enust be June 1 x D. 20 H. 23','j'j| Ic b is but 2i' different from the former.(„ e Time of the Tropic therefore, in AnnaWe may conclude was Juke 11 D,12'.

E will now give an Example of0 , i0 riner Method by the Shadow of a^. Qr ticm 33 Eeet high, which Gajjendus atmac { e u s e of for determining theJii 0 b°rtion of the Gnomon to its Solstitial

J tb^. ,

tli,

^ This he did in the Year 1636, and

^ u He

'^periments were as follow,

s 3176 A f p arts,of which

! q t n C 2 ! i j-,

XT

2 i P'^ W Styk* J 3 1 75 s J the GnomonZl j she Shadow) 3*75* - '

v -te

t ~ ~ j was 80/1,28,

f31759 1 ‘

indeed the End of tire Shadow, in~

^ of being received on the Plane c d x

bendicular to the Rays, was taken on

(st^3 the

n hid