298 
STAFF COMMANDER EVANS AND MR. A. SMITH ON THE MAGNETIC 
Table II. — Iron-plated, Wood-built Ships. 
Ship. 
Compass. 
Place. 
Date. 
Approximate coefficients. 
Exact coefficients. 
A 
B 
1 \° 
D 
E 
21 
25 
(£ 
© 
a 
Royal Oak. 
Iron-cased, 
wood-built, 
4056 tons, 35 guns, 
800 horse-power. 
Iron-plated ; 
head S. 49° E. 
Floated out of dock 
March 19, 1863. 
Standard. 
Chatham Mar. 19, 1863 
Chatham Apr. 11, 1863 
Sheerness June 2, 1 863 
Plymouth ...Jan. 8, 1864 
Malta Mar. i, 1864 
0 1 
-0 39 
-0 12 
-1 9 
+13 56 
+ 12 20 
+ 88 
+ 7 26 
+ 10 9 
+ 6 1 
+ 39 
+ 2 19 
+ 2 58 
° 1 
+0 1 
+0 20 
— 0 48 
-011 
-•003 
— '020 
+•253 
+ •231 
+•248 
+•218 
+'H3 
+ ■287 
+ 197 
+•128 
+•172 
+ *I 08 
+•047 
+ •061 
+ •055 
+•040 
+•052 
2 
•00 
+-0uij 
— * 0 1 .j 
Starboard 
steering. 
Chatham Apr. 11, 1863 
Sheerness June 2, 1863 
+0 15 
+24 5 
+ 14 25 
+ 1 47 
+ 1 17 
+•004 
+•377 
+•414 
+•379 
+ •241 
+ 067 
+ 031 
+•02: 
Main deck. 
"Sheemess J une 2, 1863 
-1 54 
+32 22 
+ 12 47 
+ 1 28 
-0 11 
-•033 
+•546 
+■210 
+ ■026 
—•00: 
Prince Consort. 
Iron-eased, 
wood-built, 
4045 tons, 35 guns, 
1 000 horse-power. 
Iron-plated ; 
j heads. 39° W. 
Standard. 
Milford May 25, 1863 
Plymouth ...Feb. 9, 1864 
-0 6 
-0 28 
+33 39 
+25 36 
-13 41 
- 3 53 
+ 2 18 
+ 36 
-0 4 
-0 33 
-001 
-008 
+ •569 
+•447 
-•222 
-•064 
+ 040 
+•054 
-00 
-•01 
Caledonia. 
Iron-cased, 
wood-built, 
4125 tons, 35 guns. 
1000 horse-power. 
Iron-plated ; 
headS. 26° W. 
Standard. 
Sheerness June 15, 1864 
+0 18 
+25 47 
- 8 21 
+ 2-57 
+0 20 
+ •005 
+■448 
-•138 
+•051 
; 
+-00i 
Ocean. 
Iron-cased, 
wood-built, 
4047 tons, 35 guns. 
1000 horse-power. 
Iron-plated ; 
head S. 79° E. 
Standard. 
Devonport ...Aug. 3, 1864 
+0 8 
+13 2 
+ 15 23 
+ 2 31 
-0 4 
+ •002 
+ •229 
+■259 
+•044 
— 00 
Royal Sovereign. 
Iron-cased, 
wood-built, 
turret ship of 
1 5 guns, 3765 tons, 
800 horse-power. 
Iron-plated ; 
head S. 72° E. 
1 
Standard. 
Portsmouth... July 21, 22, 1864 
-0 3 
+ 12 38 
+ 13 39 
+ 7 41 
+0 7 
-•001 
+•233 
+ •219 
+•134 
+■00 
Steering wheel 
(upper deck). 
Portsmouth. . .July 21, 22, 1864 
-1 8 
+23 30 
-19 40 
+ 13 3 
-9 14 
-022 
+•487 
-•323 
+•238 
-•15l 
Steering wheel 
(Cap.’s cabin). 
Portsmouth... July 21, 22, 1864 
-0 25 
+20 11 
+ 4 56 
+ 6 20 
-5 10 
-•007 
+•364 
+•086 
+ 110 
-•09 
Starb a forward 
(lower deck). 
Portsmouth... July 21 , 22 , 1864 
-0 37 
-13 15 
+40 15 
+ 15 43 
-4 42 
-•004 
-•277 
+ ■563 
+•272 
-07 
Port, forward 
(lower deck). 
Portsmouth... July 21 , 22 , 1864 
+6 42 
-14 35 
-78 
+ 13 23 
+4 38 
+•117 
-•286 
-•119 
+ ■233 
+-08i 
+•01 
Suspended 
over fore- 
turret. 
Portsmouth. . .July 21, 22, 1864 
+1 0 
-19 33 
+ 9 23 
+ 89 
+ 0 1 
Enterprise \ 
(993 tons), 4 guns, 
160 h.-p. screw. 
Built and plated at 
Deptford; head 
S.56°W. Launched 
February 1864. 
Standard. 
Greenhithe ...June 7, 1864 
+ 1 24 
+14 42 
-18 45 
+ 2 34 
+0 35 
+•025 
+•257 
-•312 
+•045 ■ 
Wolverene 2 . 
(703 tons), 2 1 guns, 
400 h. p. screw. 
Built at Woolwich; 
head S.S.W. 
Launched in 1863. 
Standard. 
Greenhithe ...May 31, 1864 
+0 23 
+ 14 10 
- 2 11 
+ 3 20 
+0 46 
+•007 
+•253 
-•036 ■ 
+•058 ■ 
+01 
1 Wood bottom, Iron-cased, with central iron battery. Iron topsides, decks and beams. a Wood hull, iron beams and stanchions. 
