GANNETT.] 
GEOGRAPHIC TABLES AND FORMULAS. 
77 
Tablk 9. — Areas of quadrilaterals of earth's surface of 30 f extent in latitude and longitude. 
[From Smithsonian Geographical Tables. ] 
Middle lati- 
tude of 
quadrilateral. 
00 
15 
30 
45 
1 00 
1 15 
1 30 
1 45 
2 00 
2 15 
2 30 
2 45 
3 00 
3 15 
3 30 
3 45 
4 00 
4 15 
4 30 
4 45 
5 00 
5 15 
5 30 
5 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 
386.76 
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 
Mi tmie e of* Areain 
quadrilateral, square miles. 
11 00 
11 15 
11 30 
11 45 
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 
12 00 1 
12 15 ! 1 
12 30 I 1 
12 45 j 1 
13 00 i 1 
13 15 ! 1 
13 30 ! 1 
13 45 S 1 
14 00 ! 1 
14 15 ! 1 
14 30 ! 1 
14 45 | 1 
15 00 ! 1 
15 15 ! 1 
15 30 ! 1 
15 45 i 1 
16 00 j 1 
16 15 i 1 
16 30 | 1 
16 45 ! 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. 50 
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 I 
112.92 j 
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 
30 30 
30 45 
31 00 
31 15 
31 30 
31 45 
32 00 
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 
