[ ^9 ] 
of the given bore, taken in inches. Thus, fiippofe* 
the given bore was lo inches in diameter (the fquare 
of which is loo) and the height of water in the pipe 
of lo inches bore was 85 feet, The quantity 
and weight of the water ?, 
F.high. 
Cubic inches. 
Troy ounces. 
Avoird. ounces. 
80 
753.982248 
397.698720 
43 (>. 3323 i 2 . 
5 
47 123890 
24.856170 
27.270769 
85 
801 .106138 
422.554890 
493.603081 
Mult, by 
100 
100 
100 
Anfw. 
80110.613800 
42255.489000 
46360.308100 
Which number (801 10.6) of cubic inches being 
divided by 231, gives 346.8 for the number of v/ine 
gallons i and the refpedfive w'eights (42255.489 troy 
ounces, and 46360.308 avoirdupoife ounces) being 
divided, the frit by 12, and the laft by 16, give 
3-521.29 for the number of troy pounds, and 2897.513 
tor the number of avoirdupoife pounds. And fo 
much would be required to balance this quantity of’ 
water in a pump, or any other hydraulic engine, 
and as much more to raife it as would be fufficient 
to overcome the fridtion of the engine. 
The realbn for removing the decimal points one - 
place forward for tens, two places for hundreds, &cc. 
is- evident : for, when any number confids of integer 
and decimal figures, tlie fetting of the decimal point 
one place forward is the fame thing as multiplying 
the number by lO; two places forward, the fame 
as multiplying the number by 100 j and fo on : as- 
tlie tables, tbemfelves are calculated only from.-, 
i to 9. 
