2 9 8 
Mr. Atwood’s Disquisition on 
Water- 
lines, or 
horizontal 
Sections. 
Areas of the 
horizontal 
Sections. 
Square feet. 
Distances 
from the 
Section 
12. 
Products of each 
area, multiplied 
into its distance 
from the Section 
12. 
Numbers for 
computing 
according to 
the Rule u. 
■ 1 
Products. 
12 
6633.6 
O 
00000.0 
1 
• 
11 
6368.4 
2 
131 3 68 
4 
525 47 - 2 
20 
6 499-3 
4 
25997-2 
2 
51994-4 
9 
6324.O 
6 
37944 -° 
4 
131776.0 
8 
6238.O 
8 
49904.0 
2 
99808. 
7 
394 8 -8 
10 
39488.0 
4 
237952 - 
6 
3687.8 
12 
68233.6 
2 
I36507.2 
5 
5333-4 
14 
74947.6 
4 
2 9979°-4 
4 | 
4906.6 
16 
783O3.6 
1 
78503.6 
Sum of the products == 
1108880.8 
The common interval between the sections being 2 feet, the 
sum of all the products arising from multiplying each thin 
horizontal segment contained between the section 12 and 4, 
into its distance from the water-section, will be ■§■ of 1108880.8 
= 739253 , by Rule 11. 
Numbers for 
computing 
according to 
Rule hi. 
4 
4906.6 
78505.6 
1 
78505.6 
3 
4298.6 
l8 
77374-8 
3 
232124.4 
2 
3417.0 
20 
6834O.O 
3 
205020.0 
1 
9250 
22 
20350.0 
1 
20350.0 
bb B 
536000.0 
Sum of the products arising from multiplying each thin 
horizontal segment between the section 4 and 1, into its distance 
