100 
GEOGRAPHIC TABLES AND FORMULAS. 
[BULL. 234. 
Table 12. — Areas of quadrilaterals of earUi's surface of 15^ extent in latitude and longi- 
tude — Continued. 
[From Smithsonian Geographical Tables.] 
Middle latitude 
1 
Area in 
Middle latitude 
Area in 
Middle latitude 
Area in 
of quadrilateral. 
square miles. 
of quadrilateral. 
square miles. 
of quadrilateral. 
square miles. 
o 
/ 
// 
o 
/ 
// 
o 
/ 
// 
49 
37 
30 
193. 93 
55 
07 
30 
171.39 
60 
37 
30 
147. 21 
49 
45 
00 
193.44 
55 
15 
00 
170. 86 
60 
45 
00 
146. 64 
49 
52 
30 
192. 94 
55 
22 
30 
170. 33 
60 
52 
30 
146. 07 
50 
00 
00 
192. 45 
55 
30 
00 
169. 79 
61 
00 
00 
145. 50 
50 
07 
30 
191. 95 
55 
37 
30 
169. 26 
61 
07 
30 
144. 93 
50 
15 
00 
191. 46 
55 
45 
00 
168. 72 
61 
15 
00 
144. 36 
50 
22 
30 
190. 96 
55 
52 
30 
168. 19 
61 
22 
30 
143. 79 
50 
30 
00 
190. 46 
56 
00 
00 
167. 65 
61 
30 
00 
143. 22 
50 
37 
30 
189. 96 
56 
07 
30 
167. 11 
61 
37 
30 
142. 65 
50 
45 
00 
189. 46 
56 
15 
00 
166. 57 
61 
45 
00 
142. 08 
50 
52 
30 
188. 96 
56 
22 
30 
166. 03 
61 
52 
30 
141.50 
51 
00 
00 
188. 46 
56 
30 
00 
165. 49 
62 
00 
00 
140. 93 
51 
07 
30 
187. 96 
56 
37 
30 
164. 95 
62 
07 
30 
140. 35 
51 
15 
00 
187. 46 
56 
45 
00 
164. 41 
62 
15 
00 
139. 78 
51 
22 
30 
186. 95 
56 
52 
30 
163. 87 
62 
22 
30 
139. 20 
51 
30 
00 
186. 45 
57 
00 
00 
163. 32 
62 
30 
00 
138. 62 
51 
37 
30 
185. 94 
57 
07 
30 
162. 78 
62 
37 
30 
138. 04 
51 
45 
00 
185. 43 
57 
15 
00 
162. 23 
62 
45 
00 
137. 47 
51 
52 
30 
184. 92 
57 
22 
30 
161.68 
62 
52 
30 
136. 89 
52 
00 
00 
184. 41 
57 
30 
00 
161.14 
63 
00 
00 
136. 31 
52 
07 
30 
183. 90 
57 
37 
30 
160. 59 
63 
07 
30 
135. 73 
52 
15 
00 
183. 39 
57 
45 
00 
160. 04 
63 
15 
00 
135. 15 
52 
22 
30 
182. 88 
57 
52 
30 
159. 49 
63 
22 
30 
134. 56 
52 
30 
00 
182. 37 
58 
00 
00 
158. 94 
63 
30 
00 
133. 98 
52 
37 
30 
181. 85 
58 
07 
30 
158. 39 
63 
37 
30 
133. 40 
52 
45 
00 
181. 34 
58 
15 
00 
157. 84 
63 
45 
00 
132. 81 
52 
52 
30 
180. 82 
58 
22 
30 
157. 29 
63 
52 
30 
132. 23 
53 
00 
00 
180. 31 
58 
30 
00 
156. 73 
64 
00 
00 
131.64 
53 
07 
30 
179. 79 
58 
37 
30 
156. 18 
64 
07 
30 
131.06 
53 
15 
00 
179. 27 
58 
45 
00 
155. 62 
64 
15 
00 
130. 47 
53 
22 
30 
178. 75 
58 
52 
30 
155. 07 
64 
22 
30 
129. 88 
53 
30 
00 
178.23 . 
59 
00 
00 
154. 51 
64 
30 
00 
129. 29 
53 
37 
30 
177.71 
59 
07 
30 
153. 96 
64 
37 
30 
128. 70 
53 
45 
00 
177.19 
59 
15 
00 
153. 40 
64 
45 
00 
128. 12 
53 
52 
30 
176. 67 
59 
22 
30 
152. 84 
64 
52 
30 
127. 53 
54 
00 
00 
176. 14 
59 
30 
00 
152. 28 
65 
00 
00 
126. 94 
54 
07 
30 
175. 62 
59 
37 
30 
151. 72 
65 
07 
30 
126. 34 
54 
15 
00 
175. 10 
59 
45 
00 
151. 16 
65 
15 
00 
125. 75 
54 
22 
30 
174.57 
59 
52 
30 
150. 60 
65 
22 
30 
125. 16 
54 
30 
00 
174. 04 
60 
00 
00 
150. 03 
65 
30 
00 
124. 57 
54 
37 
30 
173. 51 
60 
07 
30 
149. 47 
65 
37 
30 
123. 97 
54 
45 
00 
172. 99 
60 
15 
00 
148. 91 
65 
45 
00 
123. 38 
54 
52 
30 
172.46 
60 
22 
30 
148. 34 
65 
52 
30 
122. 78 
55 
00 
00 
171.93 
60 
30 
00 
147. 77 
66 
00 
00 
122. 19 
