362 
MK. EYAXS OX THE DEYIATIOX OE THE COIMPASS 
Table I. — Iron-built Ships, Her Majesty’s Xa-vy {cordinued). 
Hate. 
Place of observation. 
Ship’s name and tonnage. 
Permanent coeiEcieDts. 
Coefficient 
B. 
Ship’s 
force to 
Head. 
Earth’s 
horizontal 
force 
= 1-000. 
Coefficient 
C 
Ship’s , 
force to . 
Starboard, i 
Earth's 
horizontal 
force 
=1^1. 
A. 
D. 
E. 
Apr. 17, 1856. 
VTTT.flAV- 1764 
-6 9 
4-3 7 
-6 3 
— 7 37 
— 0 1325 
4 - 3 33 
— 1 
1 
0-0619 
continued. 
.F.D. 
+0 27 
-f“l 55 
+0 21 
-0-0883 
0 0663 
r F.u. 
+0 30 
-)-2 56 
-0 3 
- 1 58 
-0 0343 
-r 4 58 
0 - 0 S 66 
Sept. 4, 1857. 
Portsmouth 

F.D. 
+0 13 
+2 55 
-0 16 
4 - 0 51 
0-0148 
0-0903 
r F.D. 
+0 40 
+2 48 
- 1-0 28 
- 4 20 
-00756 
-r 9 37 
01670 
Aug. 16, 1859. 
Portsmouth 

F.D. 
+0 36 
+2 51 
-1-0 5 
- 1 34 
-0-0273 
+ 9 25 
0-1636 
F.D. 
-0 15 
+ 1 46 
-t-0 32 
-12 43 
- 0-2201 
- 2 5 
-0-0363 
Oct. 22, 1851. 
Sheerness 
Meg^r.v, 1395 
[f.d. 
+0 3 
+2 32 
-0 8 
-13 5 
-0-2264 
- 3 12 
— 0-055 S 
Sept. 11, 1852. 
Slieerness 
-0 24 
+ 1 15 
+0 29 
-11 52 
-0-2056 
-h 6 52 
0-1196 
Dec. 8, 1853. 
Antigua 
+° 5 
+ 1 36 
-0 5 
- 5 46 
— O'ICCf 
+ 3 5 S 
c -0692 
Jan. 23, 1857. 
Portsmouth 
+0 46 
+ 1 48 
-0 23 
-12 1 
-0 2082 
-r 3 51 
04)671 
i 
Jan. 20, 1817. 
Grreenhithe 
Birkenhead, 1405 
+0 18 
+2 53 
-0 11 
-13 51 
-0-2394 
- 6 27 
-0-1123 i 
Feb. 19, 1847. 
Portsmouth 
-0 14 
+2 44 
-fO 25 
-13 51 
-0 2394 
- 6 39 
-0-1158 , 
Mar. 20, 1848. 
Portsmouth 
-0 29 
+2 48 
+0 23 
-13 30 
-0 2334 
- 6 32 
! 
-0-113S , 
1850. 
Portsmouth 
-0 SO 
+2 13 
-1-0 22 
-13 36 
-0-2351 
- 0-1201 i 
Feb. 17, 1851. 
Portsmouth 
-0'33 
+2 12 
-1-0 27 
-13 51 
-0-2394 
— 6 48 
-0-1184 
Aug. 10, 1846 
Greenhithe 
TriTnEXT- 8ii0 
+0 38 
+4 3 
4-0 45 
4-20 8 
0-3442 
-r 1 13 
0-0212 
1847. 
Malta 
+0 25 
-f3 46 
4-0 30 
4-13 3 S 
c- 235 - 
— 20 
- 0*0349 
May 23, 1848. 
Greenhithe 
+0 37 
-)-3 52 
4-0 21 
4-21 I 
- 0 13 
-0-003S 
Oct. 17 , 1849. 
Plymouth 
+0 25 
+3 31 
-0 6 
4 - IS 26 
0-3162 
- 0 2 
-0 0006 
Sept. 8 , 1852. 
Greenhithe 
+0 5 
+3 38 
4-0 27 
4-19 41 
- 2 37 
— 0 0456 
Rio Janeiro 
- 4-4 
— 0 0 
4-12 iS 
Dec. 23, 1856. 
Greenhithe 
-0 11 
-L3 43 
4-0 10 
4-21 50 
0-3719 
- 3 26 
-0-0599 
May 1857 . 
Ascension Island 
• 
+ i 3 
+2 50 
4-1 21 
+ 12 IS 
0*2 IZ2 
- 4 2 
— 0*0703 
November . 
Cape of Good Hope 
— 0 22 
4-2 SS 
— 0 6 
4-16 27 
0-2832 
- I 35 
- 0 - 02-6 
Oct. 31, 1859. 
Greenhithe 
-0 8 
+3 26 
4-0 34 
4-18 40 
0-3201 
4 - 0 50 
0-0145 j 
Nov. 19, 1855. 
Greenhithe 
Hespek, 808 
+ 1 13 
+3 10 
-|-0 06 
- 0 7 
- 0-0020 
- 3 17 
-005 73 1 
Oct. 11, 1856. 
Greenliithe 
+0 12 
+3 0 
4-0 38 
4 - 1 28 
0-0256 
- 0 27 
— 0-0078 
May 1, 1857. 
Greenliithe 
+0 12 
+3 17 
4-0 21 
4- 2 22 
0-0413 
4 - 0 23 
i 
0-0067 j 
1 
Greenhithe 
CARAnoc. 676 
+0 43 
+3 13 
4-0 18 
-12 33 
-0-2173 
- 4 15 
-0-0741 : 
May 21, 1852. 
Malta 
+0 31 
4-2 15 
— 0 17 
- 9 42 
-0-1685 
- I 33 
! 
— 0*0270 1 
Nov. 4, 1855. 
Greenhithe 
-0 25 
+2 6 
4-0 12 
- 10 54 
-0-1891 
- 2 8 
-0-0372! 
