gannett] GEOGRAPHIC TABLES AND FORMULAS. 255 
Table 24. — For obtaining differences of altitude for any minute, etc. — Continued. 
11° 
Corrections for 
curva- 
1 
2 
3 
4 
5 
(5 
7 
8 
9 
ture, refraction, and 
height of instruments 

1, 026. £ 
2,053 
3,079 
4,105 
5,132 
6,158 
7,184 
8,211 
9,237 
1 
l,027.t 
2, 056 
3, 084 
4,112 
5, 140 
6,168 
7,195 
8, 223 
9, 251 
Miles. 
Feet. 
Miles 
Feet. 
2 
l,029.f 
1 2,059 
3, 089 
4,118 
5,148 
6,177 
7,207 
8,236 
9,266 
1.6 
6 
10.2 
64 
3 
1,031.1 
1 2,062 
3,093 
4,124 
5, 156 
6,187 
7, 218 
8, 249 
9, 280 
2.1 
7 
10.3 
65 
4 
1,032.7 
2,065 
3, 098 
4,131 
5,164 
6,196 
7, 229 
8, 262 
9, 294 
2.5 
8 
10.4 
67 
5 
1,034. a 
! 2,069 
3, 103 
4,137 
5, 172 
(i, 206 
7, 240 
S, 275 
9,309 
2.8 
9 
10.5 
68 
6 
1,036 
2, 072 
3,108 
4,144 
5,180 
6, 215 
7,251 
8, 287 
9,323 
3.1 
10 
10.6 
69 
7 
1,038 
2, 075 
3,113 
4,150 
5,188 
6,225 
7,263 
8, 300 
9, 338 
3.4 
11 
10.7 
70 
8 
1,039 
2,078 
3,117 
4, 156 
5,196 
6,235 
7,274 
8,313 
9, 352 
3.6 
12 
10.8 
71 
9 
1,041 
2,081 
3,122 
4,163 
5,204 
6,244 
7,285 
8,326 
9,366 
3.8 
13 
10.9 
73 
10 
1,042 
2,085 
3,127 
4,169 
5,212 
6,254 
7, 296 
8,338 
9,381 
4.1 
14 
11.0 
74 
11 
1,044 
2, 088 
3, 132 
4,176 
5,219 
6,263 
7,307 
8,351 
9,395 
4.3 
15 
11.1 
75 
12 
1,045 
2,091 
3,136 
4,182 
5, 227 
6,273 
7.31S 
8,364 
9,409 
4.5 
16 
11.2 
77 
13 
1,047 
2,094 
3,141 
4,188 
5, 235 
6,283 
7,330 
8,377 
9, 424 
4.7 
17 
11.3 
78 
14 
1,049 
2,097 
3,146 
4,195 
5,243 
6, 292 
7,341 
8,390 
9,438 
4.8 
18 
11.4 
79 
15 
1,050 
2,101 
3, 151 
4,201 
5, 251 
6, 302 
7,352 
8,402 
9, 453 
5.0 
19 
11.5 
80 
16 
1,052 
2,104 
3, 156 
4,208 
5, 259 
6,311 
7, 363 
8, 415 
9, 467 
5.2 
20 
11.6 
82 
17 
1, 053 
2, 107 
3,160 
4,214 
5, 267 
6, 321 
7, 374 
8,428 
8,481 
5.4 
21 
11.7 
83 
18 
1,055 
2, 110 
3, 165 
4, 220 
5, 275 
6, 330 
7, 386 
8,441 
9, 496 
5.5 
22 
11.8 
84 
19 
1,057 
2,113 
3,170 
4,227 
5,283 
6,340 
7,397 
s, 153 
9, 510 
5.7 
23 
11.9 
86 
20 
1,058 
2,117 
3, 175 
4, 233 
5, 291 
6,350 
7,408 
8,466 
9,524 
5.8 
24 
12.0 
87 
21 
1,060 
2, 120 
3,180 
4, 239 
5,299 
6, 359 
7,419 
8,479 
9, 539 
6.0 
25 
12.1 
89 
22 
1,061 
2, 123 
3,184 
4, 246 
5, 307 
6,369 
7,430 
8, 492 
9,553 
6.1 
26 
12.2 
90 
23 
1,063 
2, 126 
3,189 
4,252 
5, 315 
6,378 
7,441 
8, 504 
9, 568 
6.3 
27 
12.3 
91 
24 
1,065 
2,129 
3,194 
4,259 
5,323 
6,388 
7,453 
8,517 
9, 582 
6.4 
28 
12.4 
93 
25 
1,066 
2,133 
3,199 
4,265 
5, 331 
6,398 
7,464 
8, 530 
9, 596 
6.5 
29 
12.5 
94 
26 
1,068 
2, 136 
3, 204 
4,271 
5, 339 
6, 407 
7,475 
8,543 
9,611 
6.7 
30 
12.6 
96 
27 
1, 069 
2, 139 
3,208 
4,278 
5, 347 
6,417 
7,486 
8,556 
9, 625 
6.8 
31 
12.7 
97 
28 
1,071 
2, 142 
3, 213 
4,284 
5, 355 
6, 426 
7,497 
8, 568 
9,639 
6.9 
32 
12.8 
99 
29 
1,073 
2,145 
3,218 
4,291 
5,363 
6,436 
7,509 
8,581 
9,654 
7.0 
33 
12. 9 
100 
30 
1,074 
2,148 
3,223 
4,297 
5, 371 
6,445 
7,520 
8,594 
9,668 
7.2 
34 
13.0 
102 
31 
1,076 
2, 152 
3,227 
4,303 
5, 379 
6, 455 
7,531 
8,607 
9, 682 
7.3 
35 
13.1 
103 
32 
1,077 
2,156 
3, 232 
4,310 
5,387 
6, 465 
7,542 
8,619 
9, 697 
7.4 
36 
13.2 
105 
33 
1,079 
2,158 
3, 237 
4, 316 
5, 395 
6,474 
7,553 
8,632 
9,711 
7.5 
37 
13.3 
106 
34* 
1,081 
2,161 
3,242 
4, 323 
5, 403 
6,484 
7,564 
8,645 
9, 726 
7.6 
38 
13.4 
108 
35 
1,082 
2,164 
3,247 
4, 329 
5, 411 
6,493 
7,576 
8, 658 
9,740 
7.8 
39 
13.5 
109 
36 
1,084 
2,168 
3,252 
4, 335 
5, 419 
6,503 
7.587 
8,671 
9, 755 
7.9 
40 
13.6 
111 
37 
1,085 
2,171 
3, 256 
4, 342 
5, 427 
6, 513 
7, 598 
8,683 
9, 769 
8.0 
41 
13.7 
112 
38 
1,087 
2,174 
3, 261 
4,348 
5,435 
6, 522 
7,609 
8, 696 
9,783 
8.1 
42 
13.8 
114 
39 
1,089 
2, 177 
3,266 
4, 355 
5,443 
6,532 
7, 621 
8,709 
9,798 
8.2 
43 
13.9 
115 
40 
1,090 
2,181 
3, 271 
4,361 
5, 451 
6,542 
7, 632 
8,722 
9,812 
8.3 
11 
14.0 
117 
41 
1,092 
2, 184 
3, 276 
4,367 
5, 459 
6, 551 
7, 613 
8, 735 
9,827 
8.4 
45 
14.1 
119 
4'2 
1,093 
2,187 
3, 280 
4,374 
5,467 
6, 561 
7, 654 
8,748 
9,841 
8.5 
46 
14.2 
120 
43 
1,095 
2,190 
3, 285 
4,380 
5,475 
6,570 
7, 665 
8,760 
9, 856 
8.6 
■ 47 
14.3 
122 
44 
1,097 
2, 193 
3, 290 
4,387 
5,483 
6, 580 
7,677 
8,773 
9,870 
8.7 
48 
14.4 
124 
45 
1,098 
2,197 
3, 295 
4,393 
5,491 
6,590 
7,688 
8,786 
9,884 
8.8 
49 
14.5 
125 
46 
1,100 
2, 200 
3, 300 
4,399 
5,499 
6, 599 
7, 699 
8,799 
9, 899 
8.9 
50 
14.6 
127 
47 
1,101 
2,203 
3,304 
4,406 
5, 507 
6,609 
7,710 
8,812 
9,913 
9.0 
51 
14.7 
129 
48 
1,103 
2, 206 
3,309 
4, 412 
5, 515 
6,618 
7, 721 
8,825 
9, 928 
9.1 
52 
14.8 
130 i 
49 
1,105 
2, 209 
3, 314 
4,419 
5, 523 
6,628 
7,733 
8,837 
9,942 
9.2 
53 
14.9 
132 
50 
1,106 
2, 213 
3,319 
4, 425 
5,531 
6,638 
7,744 
8,850 
9,956 
9.3 
54 
15.0 
134 
51 
1,108 
2,216 
3, 324 
4, 431 
5, 539 
6,647 
7,755 
«,863 
9, 971 
9.4 
55 
15.1 
135 
52 
1,109 
2,219 
3, 328 
4,438 
5,547 
6, 657 
7,766 
8, 876 
9, 985 
9.5 
56 
15.2 
137 
53 
1,111 
2,222 
3, 333 
4,444 
5, 555 
6, 666 
7,778 
8,889 
10, 000 
9.6 
58 
15.3 
139 
54 
1,113 
2,225 
3,338 
4,451 
5, 563 
6,676 
7,789 
8,901 
10, 014 
9.7 
59 
1,5.4 
141 
55 
1,114 
2,229 i 3,343 
4,457 
5, 571 
6, 686 
7,800 
8,914 
10, 029 
9.8 
60 
15.5 
142 
56 
1,116 
2,232 , 3,348 
4,464 
5, 579 
6,695 
7,811 
8, 927 
10, 043 
9.9 
61 
15.6 
144 
57 
1,117 
2,235 1 3,352 
4,470 
5, 587 
6, 705 
7, 822 
8,940 
10, 057 
10.0 
62 
15.7 
146 
58 
1,119 
2,238 
3, 357 
4,476 
5, 595 
6, 715 
7,834 
8,953 
10, 072 
10.1 
63 
15.8 
148 ; 
59 
1,121 
2, 241 
3, 362 
4,483 
5,603 
6,724 
7, 845 
8,966 
10, 086 
15.9 
16.0 
150 ! 
151 | 
60 
1, 122 
2, 245 
3,367 
4,489 
5, 611 
6,734 
7,856 
8,978 
10,101 
a For all distances under 1,6 miles the correction may be taken as + 5 feet. Height of instrument 
assumed 4.5 feet, 
