348 
ME. EVANS ON THE DEVIATION OF THE COMPASS 
Examples of permanency of ship’s force on changes of geographic position are 
exhibited in the following vessels ; in which, for the sake of comparison, the modulus 
has been multiplied by the horizontal intensity at the place. 
Urgent. 
Ship’s 
force. 
” "N 
Year. 
Direction. 
Amount. 
1855. England 
O 
,. 176 
0-215 
1855. Malta 
,. 184 
0-189 
1856. England 
,. 170 
0-183 
Megaera. 
1852. England 
,. 150 
0-238 
1853. Antigua 
. 145 
0-213 
1857* England 
. 162 
0-219 
Triton. 
1852. England 
. 198 
0-142 
1852. Corfu 
. 200 
0-142 
^ /1857- England 
. 213 
0-178 
tl858. Fernando Po 
. 181 
0-188 
Oberon. 
1851. England 
. 295 
0-230 
1856. Malta 
. 297 
0-201 
^ / 1858. England 
. 323 
0-180 
\ 1858. Monte Video 
. 303 
0-179 
Bloodhound. 
1845. England 
. 351 
0-256 
1846. Constantinople 
. 347 
0-281 
1846. Atliens 
. 344 
0-249 
Assistance. 
] 857. England 
. 129 
0-259 
1858. Canton 
. 119 
0-274 
Adventure. 
1857. England 
. 124 
0-305 
1858. Whampoa, China.. 
. 118 
0-307 
Caradoc. 
1848. Englaml 
. 199 
0-230 
1852. Malta 
. 189 
0-258 
1855. England 
. 191 
0-193 
1857. Malta 
. 191 
0-229 
1858. Malta 
. 200 
0-242 
Industiy. ship-, force. 
Year. Direction. Amount. 
1856. Malta 
359 
0-240 
1856. England 
13 
0-256 
Sharpshooter. 
1852. England 
180 
0-280 
1853. Rio de Janeiro ... 
189 
0-253 
1857. England 
160 
0-235 
1857. Isles de Los, Africa 
172 
0-222 
Jackal. 
1845. England 
353 
0-288 
1846. Ath^ens 
355 
0-274 
1847. Lisbon 
352 
0-260 
Trident. 
1846. England 
363 
0-345 
1847. Malta 
357 
0-359 
1848. England 
360 
0-359 
1852. England 
353 
0-342 
1852. Rio de Janeiro 
351 
0-368 
1856. England 
351 
0-376 
1857. Ascension Island... 
342 
0-373 
1857. Cape of Good Hope 
354 
0-333 
1859. England 
363 
0-320 
Harpy. 
1854. England 
5 
0-152 
1857. hlaTta 
352 
0-166 
^^’ilberforce. 
1843. England 
223 
0-1S5 
1843. River Gambia 
ooo 
0-193 
Torch. 
1852. England 
356 
0-186 
1852. Madeira 
r34S 
\352 
0-153 
0-161 
1852 St. Vincent Island 
350 
0-19S 
1852. Rio de Janeiro 
351 
0-219 
1852. Tristan dAcunha 
337 
0-189 
1852. Cape of Good Hope 
3 
0-190 
1853. St. Paul’s Island ... 
357 
0-198 
1853. Swan River 
358 
0-182 
1853. K. George's Sound 
352 
0-214 
1856. Australia 
3 
f 0-246 
\ approx. 
* Position ot compass changed since the earlier determinations. 
