^ to Lecture XI.

t^ s ^ 0re ’ an( I one after the Solstice. Byk eanS We ^ ave t ^ ie Proportion of Dif-5 S „ e between the Points F H and F G, forV v •'/<?:: F H : F G. By the first Ob-at f r o m the Point H the Sun’s Place^ ls given; by the second, from the Pointhave the Place at L ; and by thetL n having G, we have the Point M inh'lirve.

^ 0W * et the Time between the first\ ^. ecori d Observation AT (= K L) ~ a ;

between the second and third Ob-^/ l0ll TE (=LVM) = J, FH = s, FGle CQ ’ ari( i TV-jfz the Time between theObservation and the Moment of theto be found. Then AV = a + x t% ^ == b — x ; and let the Latus Rec-

%c s the Parabola be p. Then (per Co-have P - VF Xp, and therefore VF

‘VsJ

}' In like Manner VH = ,

"■i v c = g-2 **+■£• therefbre F H

■VF

s^-s-2 ax

~lT~ "

and F G

■VI s ) = -- 2 — d ; where-

p 2 ax b z — 2 b x

d

Qjz

; and reduce-ing

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