294 
STAFF COMMANDER EVANS AND MR. A. SMITH ON THE MAGNETIC 
Table I. (continued). — Iron-plated, Iron-built Ships. 
Approximate coefficients. 
Exact coefficients. 
l 
l 
Compass. 
Place. 
Date. 
i 
A 
B 
c 
D 
E 
21 
23 
<E 
£> 
g : 
O f 
0 1 
0 1 
O / 
0 1 
Standard(aft). 
Sheerness . . 
Oct. 12, 13, 1864 
-0 16 
+19 54 
+ 2 56 
+ 6 58 
-0 56 
-•005 
+•362 
+ 047 
+ 121 
-•01 
Plymouth t .. 
Dec. 5, 1864 
-0 35 
+19 54 
+ 7 38 
+ 6 41 
-0 32 
-010 
+•361 
+■123 
+•116 
-•00 
Standard 
Sheerness ...Oct. 12, 13, 1864 
-0 10 
+21 42 
+ 1 11 
+ 7 19 
-0 31 
-■003 
+•396 
+ 019 
+•128 
-■00 
(forward). 
Plymouth . . 
Dec. 5, 1864 
+0 39 
+ 19 51 
+ 6 15 
+ 5 44 
-1 01 
+•011 
+•357 
+•102 
+ 100 
-4 
Starboard 
Sheerness . . 
Oct. 12, 13, 1864 
+0 07 
+23 31 
+ 4 10 
+ 8 51 
-1 20 
+•002 
+•432 
+ 061 
+•154 
-02 
steering. 
Plymouth . . 
Dec. 5 , 1864 
-0 55 
+23 30 
+ 10 04 
+ 7 51 
-0 30 
-016 
+•427 
+•160 
+ 137 
-00 
Main deck 
Sheerness . . 
Oct. 12, 13, 1864 
-0 47 
+12 42 
+ 2 19 
+12 13 
+0 21 
-014 
+•244 
+•031 
+•214 
+•00 
(starboard). 
Plymouth . . 
Dec. 5 , 1864 
-1 11 
+14 17 
+ 3 49 
+10 46 
+1 23 
-•021 
+•271 
+•059 
+ 188 
+•02 
- 
Standard. 
Sheerness ...Feb. 17, 18, 1862 
-0 28 
+25 43 
+ 0 17 
+ 7 0 
+0 5 
-•008 
+•464 
+ 005 
+•122 
+-00 1 
Baltic Sea ...July and Aug. 1862 
-0 17 
+ 2 * * S. 5 35 
- 0 25 
+ 6 25 
—0 41 
—•005 
+•463 
— •007 
+•112 
—•01 
Gibraltar . . 
.Nov. 15, 1862 
+0 16 
+ 15 21 
- 4 15 
+ 69 
+0 25 
+•005 
+■280 
—•069 
+•107 
+'°°! ! 
f Heeled to Port 
+ 1 47 
+ 16 39 
+ 2 49 
+ 7 18 
+1 50 
+•031 
+' 3°5 
+•045 
+•127 
+•03 , 
Lisbon < Upright, Jan. 1863 ... 
+ 1 41 
+ 16 26 
- 1 5 
+ 74 
+0 42 
+•029 
+•302 
— ■018 
+-i *3 
+ ‘°1 ■' 
(_ Heeled 7J 6 to Starboard 
+ 1 38 
+ 16 27 
- 4 40 
+ 70 
-0 5 
+■028 
+- 3 °i 
-•075 
+•122 
+■0(1 li 
Flushing &1 
Portsmouth J 
March 3, 21, 1863 
+0 5 
+20 50 
- 2 8 
+ 6 50 
-0 11 
+•001 
+•379 
-•034 
+ 119 
-Oflj 
Plymouth . . , 
Tenerife 
.Dec. 1863 
+ 1 6 
+22 18 
- 0 57 
+ 6 59 
-0 7 
+•019 
+■403 
+ •292 
-016 
+ 122 
+•114 
-• 00 .; 
.Jan. 2, 3, 1864 ... 
—•040 
Gibraltar . . 
.Jan. 9, 13, 1864... 
— 1 0 
+ 15 25 
- 1 44 
+ 6 30 
—0 46 
-•017 
+•282 
— ■928 
+ ■113 
—•oil 
Lisbon 
.Jan. and Feb. 1864 
+0 40 
+ 16 37 
- 1 18 
+ 6 22 
-0 7 
+ •012 
+ ‘ 3°3 
— •021 
+■111 
— -oc 
Portland 
.Mar. and Apr. 1 864 
+0 21 
+21 37 
- 0 24 
+ 6 26 
-0 24 
+•005 
+ •391 
-•007 
+ 112 
— oc ; 
Portland 
Oct 1864 
-0 23 
+20 55 
-26 
+ 6 23 
+0 10 
-007 
+■379 
-034 
+•112 
+’0( 
Starboard 
Sheerness . . 
.Feb. 17, 18, 1862 
+0 16 
+ 36 14 
+ 0 56 
+10 16 
+ 1 7 
+•005 
+•653 
+•014 
+•179 
+ 011 
steering. 
Plymouth . . 
Portland & 1 
Downs ... J 
Dec. 1863 
+1 4 
+31 18 
- 1 21 
+ 10 19 
+0 36 
+•019 
+•572 
-•020 
+ 180 
+•01 
Apr. and May 1864 
+ 014 
+•586 
-•030 
+•159 
+01 
Devonport .. 
.Nov. 1864 
+•546 
-056 
+ 159 
... 
Main deck. 
Sheerness . . 
.Feb. 17, 18, 1862 
-0 51 
+36 23 
+ 0 42 
+ 14 35 
-0 55 
-•015 
+ •669 
+•010 
+•254 
-0,| 
Plymouth . . 
Portland &1 
Downs ... J 
.Dec. 1863 
+ 1 16 
+26 44 
+ 0 34 
+ 13 10 
-0 6 
+ 022 
+•505 
+•009 
+•230 
-•oc; 
Apr. and May, 1863 
+ 019 
+•450 
+•004 
+•233 
-•01 
Devonport .. 
Nov 1864 
+•486 
-030 
+•230 
J 
Achilles*. 
(6121 tons). 
Iron-cased, 
iron hull, 
20 guns, 
1250 horse-power. 
Built at Chatham, 
and fully plated 
in dock ; head 
S. 51° 40' E. 
magnetic. 
Floated outofdock 
Dec. 24, 1863. 
Defence. 
(3720 tons). 
Iron-plated, 
iron hull, 
16 guns, 
600 horse-power. 
Built on River 
Tyne ; head 
S. 47° W. magnetic 
Launched 
Apr. 24, 1861. 
Plated with head 
S. 19° E. magnetic. 
S3 
•464 
* A ™tt fa tw o<? 1 QRQ f In dock at Chatham ; by observations of deviation and horizontal force on one point, and 
’ ( employing X and 3) of Oct. 1864 (no machinery on board, or internal fittings) j 
SeDt 26 1864 I Complete in equipment ; by observations of deviation and horizontal force on one point. 1 _ _|_ .377 
" ' ’ ( Head moored N. 62° W., same X and 3) as above I 
Oct. 11, 1864. Same observations, X and 35 as above. Head moored S. 54° 40' E 
t After having remained in dry dock 25 days. Head S. 79° E. magnetic. 
S 
+•323 
. — + - 355 
+ •037 
+•062 
