364 
MR. EVANS OX THE DEVIATIOX OF THE COMPASS 
Table I. — Iron-built Ships, Her Majestj^’s Xary {crmtinued). 
Date. 
Place of observation. 
Ship’s name and Tonnage. 
Permanent coefficients. 
Coefficient 
B. 
Ship's 
force to 
Head. 
Earths 
horizontal 
force 
=l' 00 a 
Coefident 
c. 
Ship's 
force to 
Starboard, 
Earth', 
horizontal 
foTCSr 
= 1 - 000 . 
A. 
D. 
E. 
00 
Maltd 
Caeadoc, 676 
+0 49 
4-2 13 
0 ' 
-fo 10 
— 8 36 
- 0-1495 
- I 38 
— C*C2S ; * 
continued. 
Dec. 13 , 1358 . 
Malta 
H-i 27 
4-2 52 
— 0 20 
- 8 38 
— O'lfOI 
- 3 6 
— 0*0541 
SejA. 8 , 1847. 
Greenhithe 
Antelope, 650 
-f-0 14 
4-2 58 
4-0 10 
- 6 42 
-01 167 
+ 0 59 
0-0172 1 
Mar. 24, 1852. 
Greenhithe 
+0 2 
4-2 30 
4-0 45 
- 6 46 
-0-1178 
- 1 1 
! 
-0-0177 ; 
Sept. 8 , 1853. 
Portsmouth 
-0 22 
4-2 19 
4-0 17 
- 8 23 
-01460 
- 3 41 
1 
-0-0642 i 
Jan. 8 , 1857. 
Greenhithe 
-fO 29 
+3 4 
4-0 23 
- 3 8 
— 0*0547 
- 5 IS 
1 
-0-0924 1 
1 
Mar. 1, 1848. 
Greenhithe 
Triton, 654. . 
-1-0 40 
4-4 2 
4-0 32 
-11 56 
-0-2068 
4 - 0 26 
0-0076 ^ 
June 23, 1852. 
Greenhithe 
—0 3 
4-3 8 
4-0 23 
— 7 47 
-0-1354 
- 2 32 
-0-0442' 
Sept. 18 , 1852 . 
Corfu 
-1-^ 20 
— 0 2 
— 3 36 
- 0-0976 
— 2 4 
— 0-0361 1 
Nov. 12, 1857. 
(rreenhitlif^ 
-4-2 37 
4-0 39 
- 8 37 
y/ 
-0-1498 
- 5 34 
-0-0970 ! 
Dec. 3 , 1858 . 
Fernando Do 
— I 0 
+ 3 21 
-0 5 
- 5 36 
— 0-0976 
- 0 4 
— C*CCI2 
Nov. 16, 1847. 
Portsmouth 
Oberon, 649 
-fl 35 
4-3 23 
-40 13 
4 - 6 IS 
01097 
-14 2 
-0-2425 ; 
July 26, 1851. 
Portsmouth 
-0 20 
4-2 16 
-40 20 
4 - 5 43 
00996 
-11 57 
1 
-0-2071 ' 
Nov. z 8 , 1856 . 
Malta 
— 0 27 
4 - 3 27 
0-c6o2 
— 6 47 
1 
— o-i jSi i 
Aug. 10, 1858. 
Greenhithe 
-0 5 
4-3 27 
4-0 8 
-4 S 15 
0-1435 
- 6 16 
-0-1092 ! 
Dec. 30 , 1858 . 
Monte Video 
-\-2 I I 
4-2 50 
—0 38 
4- 3 29 
o'o 6 cS 
“5-3 
! 
- 0-0938 , 
July 19, 1854. 
Greenhithe 
Industry, 638 . . 
-0 34 
-1-2 55 
-0 32 
4-13 55 
0-2405 
4 - 3 12 
0 0558 
Jan. 10 , 1856 . 
Malta 
— 0 27 
+ 99 
0*1 sQO 
— 0 9 
- 0-0026 ' 
Sept. 30, 1856. 
Greenhithe 
—0 45 
4-2 45 
-0 23 
+ 14 27 
0-2495 
4 - 3 13 
00561 
Jan. 13, 1858. 
Greenhithe 
- 1-0 26 
4-2 31 
4-0 22 
+ 13 17 
0-2298 
- 0 37 
-0-0107 
Mig. 25, 1858. 
Greenhithe 
4-0 18 
4-2 23 
-0 9 
-f 10 25 
0-1808 
- 1 11 
■ 
-0-0206 
July 19, 1859. 
Greenhithe 
-fO 13 
-42 40 
-0 13 
+ 10 43 
0-1859 
4-0 4 
! 
0*0011 1 
Sept. 4, 1854. 
Greenhithe * 
Supply, 638 
4-0 29 
4-3 40 
-0 4 
-16 41 
-0-2871 
4-12 2 
0-2085 
April 19, 1859. 
Greenhithe 
— 0 10 
4-3 7 
-0 3 
-15 1 
-0 2591 
— 0 o(> 
-0-0105 
Sept. 19, 1859. 
Greenhithe 
-0 35 
4-2 23 
-1 20 
-14 3 
-0 2428 
— 0 53 
-0-0154 ’ 
Jan. 14, 1860. 
Greenliithe 
4-0 41 
4-2 15 
-0 47 
-15 13 
-0-2625 
- 0 5 
-0-0014 : 
Mar. 30, 1855. 
Plymouth 
WeserI, 590 
0 07 
-0 39 
-11 59 
-0-2076 
4 - 1 16 
0-0221 
Juti/ 28 , 1857 . 
St. Geo. Mouth, 11. Danube 
4-0 9 
4-4 II 
4-0 38 
- 6 33 
— 0*1141 
- 4 4" 
— 0-0834 
Nov. 17, 1859. 
G-reenhithe 
4-0 9 
4-3 35 
4-0 23 
+ 1 0 
0 0174 
, + 3 52 
0 0674 
Mar. 29, 1855. 
I'lymouth 
EecruitI' (Steam-vessel), 
+0 1 
4-4 7 
-0 16 
1-13 47 
-0-2382 
- 0 53 
-0-0154 1 
590. 
1 
t 
*■ These obsei’fations were made with a common prismatic compass : the coedlcicnts hare been computed both directly from the 
observations, and from a probable curve graphically drawn through the observations : the results accord closely, 
t These vessels were received from the Prussian Q ovcrnmcnt in 1 S j4. 
