[ ”6 ] 
Maxims and Obfervations deduced from the foregoing 
fable of Experiments. 
Maxim I. fhat the virtual or effective head being 
the fame, the ejfeB will be nearly as the quantity of 
water expended. 
This will appear by comparing the contents of the 
columns 4, 8, and 10, in the foregoing fetts of ex- 
periments i as for 
Example 1 ft, taken from N°. 8. and 25, viz. 
N°. Virtual Head. Water expended. Effe£t\ 
8 7,29 161 328 
7,29 355 785 
Now the heads being equal, if the effects are pro- 
portioned to the water expended, we (hall have by 
maxim ift, 1 61 : 3 qq : : 3 28 : 723 ; but 723 falls 
fhort of 787, as it turns out in experiment according 
to N°. 25, by 62 ; the effedt therefore of N°. 25, 
compared with N°. 8, is greater than according to 
the prefent maxim in the ratio of 14 to 13. 
The foregoing example, with four (imilar ones, 
are feen at one view in the following Table. 
Examplesj 
rt 
h 
0 
z 
Virtual 
Head. 
Expence 
of Water. 
cd 
fcfci 
W 
Comparifon. 
Variation 
Propor- 
tional Va- 
riation. 
■M 4 
Inch. 
7.29 
7» 2 9 
lb . 
161 
355 
1 
ifr } >6i •• 355 :: 328: 723 
62-p 
14 : i 3 
10,5 
10, <; 
285 
3£7 
1210 } 28 5 : 357 " 975 ; * 22 i 
1 1 — • 
121:122 
3 Mil 
6,8 
6,8 
255 
? 3 2 
686 [255 -.332 :: 541 : 704 
18— 
3 8 : 39 
4-7 
4-7 
228 
262 
| 228 : 262 : • 3 1 7 : 364 
21 + 
18:17 
I 5>°3 
1 5>°3 
307 
36° 
534 i 3 ° 7 : 3 6 ° :: 45 ° : 53 > 
3 + 
178:177 
Hence 
