C 3 C 3 3 
creafes ; confequently, if they are ever equal, as z in- 
creafes the latter muft be the largeft. But when 2: 
— o they are each equal to 1. In like manner the 
other part of this article appears. And hence, fince 
— - and b = it is manifeft that a 
a 
X 1 
p q 
1 is greater than a — z\ x b -[-Is) and 
lefs than a -]- z) xb 
than p. 
d , when q is greater 
8. Suppofe now further that the curve RQW be 
defcribed meeting the lines D h 3 F t , ht produced in 
r, a w, in fuch manner that F /, which is to C f 
as a -J- z) x b — z\ to a — z\ X b (Vid. Art. 
3.) fhall be to Q£as a ~]-z) X b — z\ to a b X 
wherever the points t and f fall at equal 
if 
pq 
diftances from h. And it is manifeft by the foregoing 
Art. that muft always be greater than C f, and 
lefs than F t. And of confequence the fame muft 
be true concerning the areas defcribed by their mo- 
tion while their equal abfciffes increafe. Wherefore 
R h t QJs greater than D hfC, and lefs than D 
ht F. 
,p ■ - q 
9. Since F / is to as a -j- z\ x b — z\ to 
P-,-9 
a b X 1 
»* 55 * 3 * 
P 
P q I 
2. • 
and a -Y z x b 
z 
(by 
Art.. 
