84 
GEOGRAPHIC TABLES AND FORMULAS. 
[BULL. 214. 
Table 10. — Areas of quadrilaterals of earth's surface of 15' extent in latitude and 
longitude — 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. 

/ 
// 

/ 
// 
o 
/ 
// 
66 
07 
30 
121.59 
71 
37 
30 
94.78 
77 
07 
30 
67.04 
66 
15 
00 
120. 99 
71 
45 
00 
94.16 
77 
15 
00 
66.41 
66 
22 
30 
120. 40 
71 
52 
30 
93.54 
77 
22 
30 
65.77 
66 
30 
00 
119. 80 
72 
00 
00 
92.92 
77 
30 
00 
65.13 
66 
37 
30 
119. 20 
72 
07 
30 
92.30 
77 
37 
30 
64.49 
66 
45 
00 
118. 60 
72 
15 
00 
91.68 
77 
45 
00 
63.85 
66 
52 
30 
118.00 
72 
22 
30 
91.05 
77 
52 
30 
63.20 
67 
00 
00 
117.40 
72 
30 
00 
90.43 
78 
00 
00 
62.56 
67 
07 
30 
116. 80 
72 
37 
30 
89.80 
78 
07 
30 
61.92 
67 
15 
00 
116. 20 
72 
45 
00 
89.18 
78 
15 
00 
61.28 
67 
22 
30 
115. 59 
72 
52 
30 
88. 55 
78 
22 
30 
60.64 
67 
30 
00 
114. 99 
73 
00 
00 
87.93 
78 
30 
00 
60.00 
67 
37 
30 
114. 39 
73 
07 
30 
87.30 
78 
37 
30 
59.35 
67 
45 
00 
113. 78 
73 
15 
00 
86.67 
78 
45 
00 
58.71 
67 
52 
30 
113. 18 
73 
22 
30 
86.05 
78 
52 
30 
58.06 
68 
00 
00 
112.57 
73 
30 
00 
85.42 
79 
00 
00 
57.42 
68 
07 
30 
111.97 
73 
37 
30 
84.79 
79 
07 
30 
56. 78 
68 
15 
00 
111. 36 
73 
45 
00 
84.16 
79 
15 
00 
56.13 
68 
22 
30 
110.76 
73 
52 
30 
83.53 
79 
22 
30 
55.49 
68 
30 
00 
110. 15 
74 
00 
00 
82.91 
79 
30 
00 
54.84 
68 
37 
30 
109. 54 
74 
07 
30 
82.28 
79 
37 
30 . 
54.20 
68 
45 
00 
108. 93 
74 
15 
00 
81.65 
79 
45 
00 
53.55 
68 
52 
30 
108. 32 
74 
22 
30 
81.01 
79 
52 
30 
52.91 
69 
00 
00 
107. 71 
74 
30 
00 
80.38 
80 
00 
00 
52.26 
69 
07 
30 
107. 10 
74 
37 
30 
79.75 
80 
07 
30 
51.62 
69 
15 
00 
106. 49 
74 
45 
00 
79.12 
80 
15 
00 
50.97 
69 
22 
30 
105. 88 
74 
52 
30 
78.49 
80 
22 
30 
50.32 
69 
30 
00 
105. 27 
75 
00 
00 
77.86 
80 
30 
00 
49.68 
69 
37 
30 
104. 65 
75 
07 
30 
77.22 
80 
37 
30 
49.03 
69 
45 
00 
104. 04 
75 
15 
00 
76.59 
80 
45 
00 
48.38 
69 
52 
30 
103. 43 
75 
22 
30 
75.95 
80 
52 
30 
47.73 
70 
00 
00 
102. 81 
75 
30 
00 
75.32 
81 
00 
00 
47.08 
70 
07 
30 
102. 20 
75 
37 
30 
74.69 
81 
07 
30 
46.44 
70 
15 
00 
101.59 
75 
45 
00 
74.05 
81 
15 
00 
45.79 
70 
22 
30 
100. 97 
75 
52 
30 
73.42 
81 
22 
30 
45.14 
70 
30 
00 
100. 35 
76 
00 
00 
72.78 
81 
30 
00 
44.49 
70 
37 
30 
99.74 
76 
07 
30 
72.14 
81 
37 
30 
43.84 
70 
45 
00 
99.12 
76 
15 
00 
71.51 
81 
45 
00 
43.19 
70 
52 
30 
98.50 
76 
22 
30 
70.87 
81 
52 
30 
42.54 
71 
00 
00 
97.88 
76 
30 
00 
70.24 
82 
00 
00 
41.89 
71 
07 
30 
97.26 
76 
37 
30 
69.60 
82 
07 
30 
41.24 
71 
15 
00 
96.65 
76 
45 
00 
68.96 
82 
15 
00 
40.59 
71 
22 
30 
96.03 
76 
52 
30 
68.32 
82 
22 
30 
39.94 
71 
30 
00 
95.41 
77 
00 
00 
67.68 
82 
30 
00 
39.29 
