96 
GEOGRAPHIC TABLES AND FORMULAS. 
[BULL. 234. 
Table 11. — Areas of quadrilaterals of earth's surface of 30^ extent in latitude and longi- 
tude — Continued. 
[From Smithsonian Geographical Tables.] 
Middle latitude 
Middle latitude 
Middle latitude 
of quadrilat- 
eral. 
Area in square 
miles. 
of quadrilat- 
eral. 
Area in square 
miles. 
of quadrilat- 
eral. 
Area in square 
miles. 
o 
/ 

/ 
o 
/ 
66 
00 
488. 75 
74 
00 
331. 62 
82 
00 
167. 57 
66 
15 
483. 97 
74 
15 
326. 58 
82 
15 
162. 37 
66 
30 
479. 19 
74 
30 
321. 53 
82 
30 
157. 16 
66 
45 
474. 40 
74 
45 
316.48 
82 
45 
151.95 
67 
00 
469. 60 
75 
00 
311. 42 
83 
00 
146. 74 
67 
15 
464. 78 
75 
15 
306. 36 
83 
15 
141. 53 
67 
30 
459. 96 
75 
30 
301.28 
83 
30 
136. 31 
67 
45 
455. 13 
75 
45 
296. 21 
83 
45 
131. 09 
68 
00 
450. 29 
76 
00 
291. 12 
84 
00 
125. 87 
68 
15 
445. 45 
76 
15 
286. 04 
84 
15 
120. 64 
68 
30 
440. 59 
76 
30 
280. 94 
84 
30 
115. 42 
68 
45 
435. 72 
76 
45 
■ 275.84 
84 
45 
110. 18 
69 
00 
430. 84 
77 
00 
270. 73 
85 
00 
104. 95 
69 
15 
425. 96 
77 
15 
265. 62 
85 
15 
99.72 
69 
30 
421. 06 
77 
30 
260. 50 
85 
30 
94.48 
69 
45 
416. 16 
77 
45 
255. 38 
85 
45 
89.25 
70 
00 
411.25 
78 
00 
250. 25 
86 
00 
84.01 
70 
15 
406. 34 
78 
15 
245. 12 
86 
15 
78.76 
70 
30 
401. 41 
78 
30 
239. 98 
86 
30 
73.52 
70 
45 
396. 47 
78 
45 
234. 83 
86 
45 
68.27 
71 
00 
391. 53 
79 
00 
229. 68 
87 
00 
63. 03 
71 
15 
386. 58 
79 
15 
224. 53 
87 
15 
57.78 
71 
30 
381.62 
79 
30 
219. 37 
87 
30 
52.53 
71 
45 
376. 65 
79 
45 
214. 21 
87 
45 
47.28 
72 
00 
371. 68 
80 
GO 
209. 05 
88 
00 
42. 03 
72 
15 
366. 70 
80 
15 
203. 88 
88 
15 
36. 78 
72 
30 
361. 71 
80 
30 
198. 70 
88 
30 
31.53 
72 
45 
356. 71 
80 
45 
193. 52 
88 
45 
26.27 
73 
00 
351. 71 
81 
00 
188. 34 
89 
00 
21.02 
73 
15 
346. 69 
81 
15 
183. 15 
89 
15 
15.76 
73 
30 
341. 68 
81 
30 
177.96 
89 
30 
10.51 
73 
45 
336. 65 
81 
45 
172. 77 
89 
1 
45 
5.26 
