1 2 BoS/or hutton’s Determination of the 
20. If n - 4 o = j ; the formula gives ^ x : 14 - 
^76 + I2h. 1. 7 —Lf 7 f + 2h. 1. % 7 = x *8109843 
for the attraction at -jh or | of the altitude from the 
bottom; being ftill lefs than the laft was. And thus 
the quantity of attraction is continually lefs and lefs the 
higher we afcend up the hill above the '251999 part, 
or in round numbers '252 part of the altitude. Let 
us now defcend, by trying the numbers below *252 ; 
and firft, 
21. If 7Z = '25 = i; the fame formula in Art. 13, 
gives t-sa x : 7 - \/ 1 3 + 2h. 1. l y~ - + |h. 1. ittzflll - 
sax i’0763589 for the attraction at ^ of the altitude ; 
and is very little lefs than the maximum. 
22. If n — - j ; the formula gives -fsa x : 9 - 
v / 2i + 2h. 1. 9 1 + 2h.l. — - -fsa x : 9 - v/21 
+ 2h. 1, 
23 + 5 \/ 21 
- sa x i'o684622 
for the attraction 
at -3% or } of the altitude ; and is fomething lefs than 
at i of the altitude. 
23. If n — f; the formula gives L x : 19 — v/9 1 + 
2 h. 1. + |h. 1. = sa x *9986188 for 
the attraction at of the altitude ; ftill lefs than the 
laft was. And, laftly, 
24. If n — o, or the point be at the bottom of the 
hill; 
