296 STAFF COMMANDER EVANS AND ME. A. SMITH ON THE MAGNETIC 
Table I. (continued). — Iron-plated, Iron-built Ships. 
Ship. 
Compass. 
Place. 
Date. 
Approximate coefficients. 
Exact coefficients. 
Eiofwmicirt 
iflEtiOB 
iw L 
iblfwetf* 
A 
B 
C 
D 
E 
51 
£ 
$ 
e 
aw 
It 
Resistance. 
! (3710 tons), 
| Iron-plated, 
iron hull, 
1 6 guns, 
[ 600 horse-power. 
Built at Millwall, 
River Thames ; 
head S. 86 V W. 
magnetic. 
Launched 
April 11, 1861. 
Plated with head 
generally to West- 
ward. 
Standard. 
Sheerness Aug. 25, 26, 1862. . . 
Lisbon Jan. 1863 
Portsmouth... June 19, 1863 
Portsmouth... Dec. 1863 
Malta Jan. 1864 
Malta Dec. 27 , 1864 
+0 36 
+ 1 54 
+0 44 
+1 1 
-0 19 
-0 4 
+ 89 
+ 45 
+ 8 21 
+ 5 46 
+ 1 36 
+ 2 30 
- 9 41 
- 6 27 
- 8 24 
- 7 22 
- 6 13 
- 6 43 
0 1 
+ 6 17 
+ 6 54 
+ 5 48 
+ 70 
+ 6 45 
+ 5 58 
0 ! 
+0 8 
+° 59 
-0 54 
-1 59 
— I 20 
+■010 
+'°33 
+•013 
+ •018 
— 'OO 5 
— *00 1 
+•149 
+'°75 
+ 152 
+•106 
+•030 
+•<344 
-•158 
-•105 
-•138 
-•120 
— •102 
— - n 6 
+•111 
+•120 
+ 101 
+ 122 
+•117 
+•104 
+- 01 C 
+' 0I 'i 
-•oie 
-■034 
— *02Cj 
§ 
:p 
!•; 
r 
■i 
h 
1 
fir 
§ 
- 
Starboard 
steering. 
Sheerness Aug. 25, 26, 1862. . . 
Portsmouth... June 19, 1863 
Portsmouth... Dec. 1863 
+0 24 
+ 1 20 
+2 10 
+ 7 55 
+10 41 
+ 9 42 
-17 15 
-13 23 
-12 25 
+ 8 28 
+ 8 56 
+ 9 43 
+ 1 9 
-0 51 
-0 49 
+ ■007 
+•023 
+ •038 
+ •147 
+■198 
+•181 
1 — -274 
-•212 
-•196 
+ •148 
+•155 
+•170 
+- 02 ( 
— 017 
—014 
Main deck. 
Sheerness Aug. 25, 26, 1862. . . 
Portsmouth... June 19, 1863 
Portsmouth... Dec. 1863 
-0 18 
+2 9 
+3 5 
+ 9 24 
+ 96 
+ 3 41 
-17 9 
-13 6 
-11 11 
+ 14 0 
+ 13 25 
+ 12 39 
+0 21 
+ 1 12 
-3 30 
-•005 
+•020 
+•054 
+■181 
+ •175 
+•070 
-•260 
—200 
-•173 
+■244 
+•232 
+•219 
+-00f 
+■ 021 , 
-■061; 
Sr 
« 
f 
Hector ( 1 ). 
(4089 tons), 
Iron-cased, 
iron hull, 
28 guns, 800 h.-p. 
Built at Glasgow ; 
head S. 20° E. 
magnetic. 
Launched 
Sept. 26, 1862. 
Plated with head 
N. 55° W. and 
S. 49° W. 
Standard. 
Portsmouth... Eeb. 16, 1864 
-0 24 
+21 53 
+ 4 54 
+ 5 24 
-0 39 
-•007 
+■392 
+•079 
+•094 
—on 
if 
f 
] 
1 
Starboard 
steering. 
Portsmouth... Eeb. 16, 1864 
+0 37 
+30 36 
+ 10 37 
+ 8 24 
-0 16 
+ 011 
+•545 
+-164 
+ 147 
f 
—•007 
Main deck. 
Portsmouth... Feb. 16, 1864 
+0 16 
+31 22 
+ 13 50 
+ 9 47 
-0 50 
+•004 
+•520 
+■239 
+•170 
—01 
Valiant. 
(4144 tons), 
Iron-plated, 
iron hull, 
28 guns, 800 h.-p. 
Built at Millwall, 
River Thames ; 
head S. 87° W. 
Launched 
Oct. 14, 1863. 
Plated with head 
generally to West- 
ward. 
Standard. 
Sheerness ...Jan. 12, 16, 1865... 
+ 1 2 
-f- 2 30 
-12 44 
+ 4 54 
-0 43 
-*-•018 
+•046 
-•211 
+•085 
-• 01 : 
is 25*> 
ij 1 »S3 
Starboard 
steering. 
Sheerness ...Jan. 12, 16, 1865... 
+2 7 
+ 7 35 
-20 12 
+ 6 52 
-0 14 
+•037 ■ 
+•138 
-•325 
+•120 
-•00 
— 
Main deck 
(Starboard). 
Sheerness ...Jan. 12, 16, 1865... 
+2 35 
+ 5 29 
-18 39 
+ 85 
-0 12 
+■045 
+•101 
-•297 
+•142 
—00 
11 
2 ® 
( l ) Hector, June 9, 1863. In basin at Portsmouth, by observations of Deviation and Horizontal force on one point, and employing X and D of 
February 1864, B= + -398, C = + '159. 
