102 
GEOGRAPHIC TABLES AND FORMULAS. 
[bull. 234. 
Table 12. — Areas of quadrilaterals of earlKs surface of 15' extent in latitude and longi- 
tude — Continued. 
[From Smithsonian Geographical Tables.] 
Middle latitude 
Area in 
Middle latitude 
Area in 
Middle latitude 
Area in 
of quadrilateral. 
square miles. 
of quadrilateral. 
square miles. 
of quadrilateral. 
square miles. 

/ 
ff 

/ 
// 
o 
/ 
// 
82 
37 
30 
38.64 
85 
07 
30 
25.58 
87 
37 
30 
12.48 
82 
45 
00 
37.99 
85 
15 
00 
24.93 
87 
45 
00 
11.82 
82 
52 
30 
37. 34 
85 
22 
30 
24.27 
87 
52 
30 
11.16 
83 
00 
00 
36.69 
85 
30 
00 
23.62 
88 
00 
00 
10.51 
83 
07 
30 
36.03 
85 
37 
30 
22.97 
88 
07 
30 
9.85 
83 
15 
00 
35.38 
85 
45 
00 
22.31 
88 
15 
00 
9.20 
83 
22 
30 
34.73 
85 
52 
30 
21.66 
88 
22 
30 
8.54 
83 
30 
00 
34.08 
86 
00 
00 
21.00 
88 
30 
00 
7.88 
83 
37 
30 
33.42 
86 
07 
30 
20.35 
88 
37 
30 
7. 22 
83 
45 
00 
32.77 
86 
15 
00 
19.69 
88 
45 
00 
6^57 
83 
52 
30 
32.12 
86 
22 
30 
19.04 
88 
52 
30 
5.91 
84 
00 
00 
31.47 
86 
30 
00 
18.38 
89 
00 
00 
5.26 
84 
07 
30 
30.81 
86 
37 
30 
17.72 
89 
07 
30 
4.60 
84 
15 
00 
30.16 
86 
45 
00 
17.07 
89 
15 
00 
3.94 
84 
22 
30 
29. 51 
86 
52 
30 
16.41 
89 
22 
30 
3.28 
84 
30 
00 
28.86 
87 
00 
00 
15.76 
89 
30 
00 
2.63 
84 
37 
30 
28.20 
87 
07 
30 
15.10 
89 
37 
30 
1.97 
84 
45 
00 
27.54 
87 
15 
00 
14.44 
89 
45 
00 
1.31 
84 
52 
30 
26.89 
87 
22 
30 
13.79 
89 
52 
30 
0.66 
85 
00 
00 
26.24 
87 
30 
00 
13.13 
