360 
ME. EYAXS OX THE DE^HATIOX OE THE COMPASS 
Table I. — Ii’on-built Ships, Her Majesty’s Saxy. 
Date. 
Place of obserration. 
Ship's name and Tonnage. 
Permanent coefficients. 
A. 
Ship’s I Ship's 
; force to force to 
Coefficient ' Coefficient 
, Earth s Earth s 
, hOTlZOIltal 
B. 
, Xearrn 5 
‘ h<»izoiital 
i force 
: = 1 * 000 . 
C. 
I force 
! =l\KfO. 
Peb. 25, 1855, 
Nov. 21, 1856 
July 4, 1859, 
Portsmouth 
Plymouth . . 
Plymouth . . . 
Himalaya, . 3453 . 
+0 46 
+0 30 
+0 20 
+3 51 +0 21 -15 58 -0-2751 - 0 33 - 0 0096 
+2 48 i +0 32 -14 3 - 0-2428 - 0 23 -0-0067 
+3 18 -0 10 -14 5 -0-2433 + 2 53 0-0503 
Sept. 21, 1855, 
Nov. 7, 1855 
June 25, 1856. 
Oct. 29, 1857, 
Oct. 11, 1859, 
Sheerness ... 
Malta 
Plymouth . . . 
Portsmouth 
Portsmouth 
Uege>-t, 1981. 
+0 4 
+0 54 
-0 20 
+0 32 
+0 38 
+2 58 
+ 3 6 
+ 2 45 
+2 22 
+2 12 
Eeb. 19, 1852. 
Sept. 28, 1852. 
Feh. 1853. 
Jan. 13, 1857. 
Nov. 5, 1859. 
Portsmouth 
Portsmouth 
Cape of Good Hope 
Portsmouth 
Portsmouth 
Simoom* 1980. 
+0 11 +3 57 
-0 9 i +4 33 
-I 47 I +4 13 
+0 10 
-o 34 
-0 5 
-0 11 
-0 9 
-0 6 
+ 0 23 
-0 9 
-0 19 
+ 0 2Z 
+3 50 j -0 10 
+3 25 ! —0 50 
-12 20 
- 7 10 
-10 23 
- 8 43 
- 8 32 
-0-2136 + 0 5 8 
-0-124- -—031 
I 
-0-1802 + 1 51 
-0-1515 I + 3 34 
i 
-0-1484: + 1 37 
(K»169 
-C-CC90' 
0-0323 1 
00622 ‘ 
I 
0-0282 i 
+20 5: 0-3434 1 - 7 15 -0 1262 
+20 7 0-3439 I - 7 18 -0-1271 j 
+ 13 6 I 0-2266 1—223 — c'C4i6 I 
+ 18 51 0 3231 ' - 1 35 -0-0276- 
' ’ ■ I 
+ 18 23' 0-3154 + 1 14 0-0215 | 
June 14, 1855. 
Mar. 13, 1856. 
Aug. 10, 1858. 
Oct. 8, 1859. 
Portsmouth 
Portsmouth 
Portsmouth 
Portsmouth 
Perseverance, 1967. 
+0 4 
+0 52 
+0 10 
+0 30 
+3 18 
+2 53 
+ 1 51 
+2 0 
Aug. 31, 1855 
Mar. 17, 1857 
Greenliithe 
Portsmouth 
Transit, 
2587. 
-0 12 
-0 44 
+3 12 
+3 12 
+0 30 
+0 20 
+0 5 
-0 10 
— / o:i — I 
6 39 -0 1158 + 1 33 0-0270! 
I I 
0-1311 j + 1 45 0-0305 
0-0926 , + 0 10 0-4X129 
0-0886 I + 2 25 0 0422 
- 5 19 
— 55 
-0 8 
-0 2 
+ 13 40 
+ 10 47 
02363 + 0 13 
0-1871 I + 2 49 
i 
0-0tl38 1 
I 
0-0491 ! 
May 4, 1857. 
May 11, 1857. 
Feh. 24, 1858. 
Portsmouth 
Portsmouth 
Canton River, China 
Assistance, 1820. 
-0 8 
+0 12 
+0 23 
+3 35 j +0 1 
+3 36 I +0 19 
I 
+ 3 24 +0 30 
May 9, 1857. 
1858. 
Portsmouth 
Whampoa, China. 
Adventure, 1794. 
-0 45 
'O 20 
+3 40 
+ 3 o 
Feb. 21, 1851. 
Sept. 30, 1851. 
July 1, 1852. 
Nov. 19, 1852. 
Feb. 1853 
May 26, 1853 
June 19, 1854. 
Sheerness ... 
Portsmouth 
Portsmouth 
Sydney, New South Jrales 
Cape of Good Hope . . , 
Portsmouth 
Portsmouth 
Vulcan, 1764 
«{?: 
U), 
D. 
.F.B. 
.F.U, 
.F.U, 
-13 0 
- 9 28 
~ 3 47 
-0 7 i - 9 52 
I 
-c 27 j - 4 o 
I 
-0 2249 +11 49; 0 2048 
I 
-0-1645 I +11 29 : 0-1991 j 
— 0-0660 ; + 6 42 O-I16- I 
-0-1714 +14 38 
i i 
-c-0697 : + 7 jS 
+0 38 ' +3 20 +0 20 I - 9 15 
+0 29 +3 0 +0 11 1 - 8 37 
+0 15 j +3 0 
-0 13 ^ +3 37 
-o 16 I +2 3 
+ 1 8 j +4 15 
+0 31 ! +3 5 
+ 0 16 I +3 29 
+0 18 
-0 44 
-f° 55 
+0 51 
+0 16 
-0 53 
- 9 25 
- 8 47 
-13 39 
- 16 3 ^ 
- 8 28 : 
- 1 40 
-0 1607 + 1 55 
0 1498 + 2 12 
-0-1636 + 2 18 
I I 
-0 1527 + 0 43 
-0-2360 +243 
-0-2765 + I 19 
-0-1472 + 3 11 
-0-0291 + 3 6 
0-2526 1 
C-132S j 
i 
0-0334 j 
0-0384 j 
0-0401 I 
00125 
0-0474 
0-0230 
0-0555 
0-0541 
* Head built S. 30° W. magnetic. Keel at an angle of 2° 15' from horizontal plane. 
t Standard compass changed in its elevation from deck 1 foot 1 1 inches ; diminishing ship's force oiie-seventh. 
I F.U. Fiuincl up. F.D. Funnel down. 
