94 
GEOGRAPHIC TABLES AND FORMULAS. 
[bull. 234. 
Table 1L — Areas of quadrilaterals of earth^s surface of 30' extenl in latitude and 
longitude. 
[From Smithsonian Geographical Tables. ] 
Middle lati- 
tude of 
quadrilateral. 
o / 
00 
15 
30 
45 
1 00 
1 15 
1 30 
1 45 
00 
15 
30 
45 
3 00 
3 15 
30 
45 
4 00 
4 15 
4 30 
4 45 
00 
15 
30 
45 
6 00 
6 15 
6 30 
6 45 
7 00 
7 15 
7 30 
7 45 
8 00 
8 15 
8 30 
8 45 
9 00 
9 15 
9 30 
9 45 
10 00 
10 15 
10 30 
10 45 
Area in 
square miles. 
188. 10 
188. 08 
188. 05 
188. 00 
187. 92 
187. 82 
187. 70 
187.56 
187. 39 
187. 20 
186. 99 
186. 76 
186. 51 
186. 24 
185. 95 
185. 62 
185. 28 
184. 92 
184. 53 
184. 13 
183. 70 
183. 24 
182. 77 
182. 28 
181. 76 
181. 22 
180. 66 
180. 08 
179. 48 
178. 85 
178. 20 
177.53 
176. 84 
176. 13 
175.39 
174. 63 
173. 86 
173. 06 
172. 23 
171. 39 
170. 52 
169. 63 
168. 73 
167. 80 
Middle lati- 
tude of 
quadrilateral. 
17 00 
17 15 
17 30 
17 45 
18 00 
18 15 
18 30 
18 45 
19 00 
19 15 
19 30 
19 45 
20 00 
20 15 
20 30 
20 45 
21 00 
21 15 
21 30 
21 45 
Area in 
square miles. 
11 00 
11 15 
11 30 
11 45 
12 00 
12 15 
12 30 
12 45 
13 00 i 
13 15 I 
13 30 -I 
13 45 j 
14 00 ' 
14 15 1 
14 30 j 
14 45 i 
15 00 j 
15 15 i 
15 30 i 
15 45 ! 
16 00 ; 1 
16 15 1 
16 30 1 
16 45 i 1 
166. 84 
165. 86 
164. 86 
163. 85 
162. 81 
161.75 
160. 67 
159. 56 
158. 44 
157. 29 
156. 12 
154. 93 
153. 72 
152. 48 
151. 23 
149. 95 
148. 65 
147. 33 
145. 99 
144. 63 
143. 25 
141.84 
140. 41 
138. 96 
137. 60 
136. 00 
134. 49 
132. 96 
131.41 
129. 83 
128. 24 
126. 62 
124. 98 
123. 32 
121. 64 
119.93 
118.21 
116.47 
114.71 
112. 92 
111.11 
109. 28 
107. 44 
105. 57 
Middle lati- 
tude of 
quadrilateral. 
22 00 
22 15 
22 30 
22 45 
23 00 
23 15 
23 30 
23 45 
24 00 
24 15 
24 30 
24 45 
25 00 
25 15 
25 30 
25 45 
26 00 
26 15 
26 30 
26 45 
27 00 
27 15 
27 30 
27 45 
28 00 
28 15 
28 30 
28 45 
29 00 
29 15 
29 30 
29 45 
30 00 
30 15 
80 30 
30 45 
31 00 
31 15 
31 30 
31 45 
32 GO 
32 15 
32 30 
32 45 
Area in 
square miles. 
103. 68 
101. 77 
099. 84 
097. 88 
095. 91 
093. 92 
091. 90 
089. 87 
087. 81 
085. 74 
083. 64 
081. 52 
079. 39 
077. 23 
075. 05 
072. 85 
070. 64 
068. 40 
066. 14 
063. 86 
061. 56 
059. 24 
056. 90 
054. 54 
052. 16 
049. 76 
047. 34 
044. 90 
042. 44 
039. 97 
037. 47 
034. 95 
032. 41 
029. 85 
027. 27 
024. 68 
022. 06 
019. 43 
016. 77 
014. 10 
011.40 
008. 69 
005. 96 
003. 20 
