376 
PRESTON. 
Compartment Heights (Sectors I to X). 
Unit —100 Feet. 
Circle. 
I. 
II. 
III. 
IV. 
y. 
VI. 
VII. 
VIII. 
IX. 
X. 
Sums. 
Ito 2 
0.0 
1.0 
3.0 
4.0 
4.0 
5.5 
6.0 
6.0 
6.0 
6.0 
41.5 
2 “ 3 
0.0 
2 5 
4.0 
5.0 
6.0 
7.0 
7.0 
7.0 
7.5 
7.5 
53.5 
3 “ 4 
1.0 
3.0 
5.0 
6.0 
7.0 
8.0 
8.0 
8.5 
9.0 
9.0 
64.5 
4 “ 5 
1.5 
4.0 
6.5 
7.5 
9.0 
9.5 
10.5 
10.5 
10.5 
10.5 
80.0 
5 “ 6 
1.5 
5.0 
7.5 
9.0 
11.0 
11.0 
11.0 
12.0 
12.0 
12.0 
92.0 
6 “ 7 
2.5 
5.5 
8.0 
11.0 
12.0 
12.0 
12.5 
12.5 
13.0 
12.5 
101.5 
7 “ 8 
2.5 
6.0 
10.0 
12.0 
12.0 
12.5 
14.0 
14.0 
14.5 
14.0 
111.5 
8 “ 9 
2.5 
7.0 
10.5 
12.0 
12.5 
13.0 
15.0 
16.0 
16.0 
16.0 
120.5 
9 “ 10 
2.5 
8.0 
12.0 
12.5 
13.0 
15.0 
16.0 
17.0 
17.0 
17.0 
130.0 
10 “ 11 
2.0 
9.0 
12.0 
13.0 
14.0 
16.0 
17.0 
17.5 
18.0 
18.0 
136.5 
11 “ 12 
2.0 
9.5 
12.5 
14.0 
15.5 
17.5 
18.0 
19.5 
21.0 
21.0 
150.5 
12 “ 13 
2.0 
10.0 
13.0 
16.0 
17.0 
18.0 
20.5 
23.0 
25.0 
25.0 
167.5 
13 “ 14 
2.0 
12.0 
16.0 
17.0 
18.0 
20.5 
24.0 
26.0 
28.0 
28.0 
191.5 
14 “ 15 
3.0 
13.0 
17.0 
19.0 
21.0 
25.0. 
28.0 
32.5 
33.0 
33.0 
224.5 
15 “ 16 
6.0 
17.0 
19.0 
23.0 
27.0 
31.0 
35.0 
40.0 
40.0 
38.0 
276.0 
16 “ 17 
6.0 
18.0 
23.0 
27.0 
33.0 
40.0 
45.0 
50.0 
44.0 
42.0 
328.0 
17 “ 18 
11.0 
23.0 
28.0 
34.0 
40.0 
50.0 
55.0 
57.0 
47.0 
46.0 
391.0 
18 “ 19 
14.0 
28.0 
34.0 
41.0 
55.0 
60.0 
65.0 
64.0 
50.0 
49.0 
460.0 
19 “ 20 
16.0 
34.0 
40.5 
55.0 
65.0 
72.0 
80.0 
70.0 
57.5 
55.0 
545.0 
20 “ 21 
21.0 
39.0 
52.0 
65.0 
76.0 
81.0 
75.0 
70.0 
65.0 
65.0 
609.0 
21 “ 22 
25.0 
46.5 
64.0 
80.0 
77.0 
75.0 
75.0 
75.0 
70.0 
70.0 
657.5 
22 “ 23 
30.0 
54.0 
74.0 
80.0 
75.0 
75.0 
75.0 
76.0 
80.0 
80.0 
699.0 
23 “24 
35.0 
66.0 
90.0 
74.0 
75.0 
75.0 
75.0 
83.0 
70.0 
69.0 
712.0 
24 “ 25 
40.0 
74.0 
100.0 
77.0 
75.0 
75.0 
75.0 
70.0 
65.0 
62.0 
713.0 
25 “ 26 
44.5 
79.5 
83.5 
87.5 
80.5 
71.5 
64.0 
62.0 
60.0 
54.0 
687.0 
26 “ 27 
56.0 
73.0 
77.5 
77.5 
76.5 
69.5 
58.5 
54.5 
52.5 
45.5 
641.0 
27 “28 
42.5 
64.0 
65.0 
65.5 
63.0 
59.5 
54.5 
46.0 
41.0 
36.0 
537.0 
28 “ 29 
43.0 
49.0 
49.0 
51.5 
51.0 
50.0 
47.0 
39.0 
29.0 
22.5 
431.0 
29 “ 30 
34.0 
32.5 
34.0 
38.5 
41.0 
42.0 
40.0 
32.5 
19.0 
9.5 
323.0 
30 “ 31 
15.5 
19.5 
22.5 
28.0 
30.5 
35.5 
29.0 
22.0 
10.0 
212.5 
31 “ 32 
8.0 
11.5 
15.0 
19.5 
22.0 
22.0 
19.0 
12.0 
129.0 
32 “ 33 
6.5 
9.5 
13.0 
15.5 
15.0 
10.5 
9.0 
79.0 
33 “ 34 
3.0 
5.5 
7.5 
9.0 
8.5 
5.5 
39.0 
34 “ 35 
1.0 
3.0 
3.0 
3.0 
1.0 
11.0 
