366 
ME, EYAXS OX THE DETIATIOX OF THE COAIPASS 
Table I. — Iron-built Ships, Her Majesty’s Xavy* [continued). 
Date. 
Place of observation. 
Ship's name and Tonnage. 
Permanent coefficients. 
Coefficient 
B. 
1 
Ship's 
force to 
Head, 
, Earth’s 
‘ horizontal 
* force 
1 =1-000. 
Cofffideni 
c. 
Ship's 
force to 1 
Siartoard. j 
Earth’s I 
horizontal 1 
force ) 
= l\«K , 
1 
A. 
D. 
E. 
r 
Shabpshootee, 503 .. . 
0 / 
-0 7 
4-4 32 
46 14 
- 7' 17 
-01268 
— 0 24 
0 - 0070 ! 
April 26, 1848 
Portsmouth 1 
! 
1 
[ 
Heeled 7° to starboard. 
+0 3 
-1-4 13 
-0 28 
’ — 7 52 
! -01369 
- 0 23 
-0-0067 1 
April 1, 1850 
Portsmouth 
+0 16 
-1-3 53 
4 O 5 
- 6 1 
■-01048 
402 
0-0006 ' 
Nov. 12, 1852 
Portsmouth 
-0 33 
43 17 
-0 21 
— 16 17 
1 
'- 0-2804 
— 0 5 
-0-0014 ' 
Feb. 8, 1853. 
Eio de Janeiro 
— 8 21: 
i 
■ — I 
j 
Dec. 28, 1857. 
Portsmouth 
+0 10 
-1-4 12 
40 3 
-12 44 
-0 2204 
1 
! ^ 4 40 
0-0814 ' 
Aug. 31, 1859. 
Isles de Los, Africa 
-o 45 
+ 3 35 
+ i 7 
— 6 58 
— 0*12 13 
1 4 0 56 
1 - i 
1 C-C163] 
1 
j 
Aug. 28, 1846. 
Greenhithe 
Eecruit (Sailing Brig), 
-0 30 
41 30 
-0 33 
+ 37 
0 0544 
1 4 6 36 
0 -1149: 
462. 
1 
Aug. 28, 1846. 
Greenhithe 
-0 41 
+ 1 / 
-1 3 
412 50 
0-2221 
4 5 12 
0-0906 
r Heeled 8° to port 
+2 18 
-1-1 57 
-0 8 
412 48 
0-2215 
4 1 30 
0-0262 : 
Nov. 1846. 
Plymouth 
< 
-1-1 51 
42 19 
-0 40 
412 41 
0-2196 
4 7 27 
0-1297 
1 
_ Heeled 8’ to starboard. 
+ 0 21 
-f2 5 
-0 13 
414 10 
0-2447 
414 25 
0-2490 ^ 
i 
Oct. 18, 1855. 
Greenliithe 
Baeon yon Humboldt, 
-0 18 
-1-5 10 
4O 24 
4I6 33 
0-284S 
— 5 47 
-0-1008 1 
afterwards named 
i 
Dec. 15, 1855. 
Greenliithe 
T5t:ppalo, 440 
+0 3 
-1-3 4 
40 5 
-16 46 
— 0-2885 
0 0102 1 
Dec. 24, 1856. 
Greenhithe 
-1-0 2 
-1-3 2 
40 6 
-19 6 
-0-3272 
. 
- 0 47 
-0-0137 1 
Eeb. 26, 1858. 
Greenhithe 
-fO 39 
42 35 
40 23 
413 12 
0-2283 
4 1 33 
i 
0-0270 1 
Mar. 17, 1846. 
Greenhithe 
Myrmidon, 374 
-0 16 
-1-3 23 
40 3 
4 15 IS 
0-2639 
4 2 58 
0-0517 ; 
Aug. 11, 1851. 
Woolwich 
-1-0 46 
-1-3 9 
-0 28 
419 23 
0-3319 
- 5 31 
! 
-0 0961 1 
July 2, 1855. 
Portsmouth 
-f 0 21 
-1-2 45 
40 12 
417 7 
0-2943 
4 0 28 
0-0081 i 
Sept. 8, 1855. 
Portsmouth 
Wye, 700 
-1-0 7 
43 24 
40 41 
- 1 40 
-0-0291 
412 53 
0 2230 i 
i 
Sept. 6, 1845. 
Plymouth 
BTiOODHOTTN’D, 378 
-1-0 23 
43 40 
40 10 
414 37 
0 2523 
- 2 12 
-0-0384 
1846. 
Constantinople 
+0 7 
+ 3 22 
-0 SI 
410 40 
0-1851 
- 2 31 
-0-C439 
1846. 
Athens (Piresus) 
+o 25 
+ 3 59 
— 0 6 
490 
0-1564 
- 2 32 
— 0*0441 
/'Heeled 8 ° to port 
+0 5 
43 21 
40 4 
411 -13 
02031 
- 4 40 
-0-0814 
May 11, 1847. 
Greenhithe 
4-0 32 
43 5 
40 20 
411 57 
0-2071 
- 1 48 
-0-0314 
i Heeled 8° to starboard. 
-0 17 
42 45 
-0 20 
411 33 
0-2002 
4 1 15 
00218 
1 
Feb. 12, 1851. 
Plymouth 
-2 39 
42 35 
40 4 
412 20 
0 2136 
- 2 49 
-00491 
Sept. 7, 1855. 
Greenhithe 
-pO 13 
42 31 
40 26 
411 -16 
0-2039 
-27 
-00369 
Mar. 20, 1845. 
Greenliithe 
Jackal, 340 
-0 25 
44 57 
-0 25 
424 7 
0-4086 
4 0 45 
00131 
July 16, 1845. 
Plymouth 
40 15 
44 13 
-0 5 
4I6 38 
0-2862 
- 1 52 
-0-0326 
1846. 
Athens {Pirceus) 
4o IS 
+ 3 52 
-0 7 
4 10 IS 
0-1779 
- 0 47 
-0-0137 
