IN WOOD-BUILT AND IRON-BUILT SHIPS, 
71 
No 
21. 
22. 
23. 
24. 
Ship’s name 
Plumper. 
Spy. 
Trident. 
Place of observation 
St. Catherine’s. 
Sheerness. 
St. Paul’s Loando. 
Greenhithe. 
Time of observation 
1852, April. 
1854, August. 
1852, December. 
1852, September. 
Index correction 
-0° 3' 
-hl° 35' 
-h0° 15' 
— 0° 2' 
Approximate modulus 
•048 
•040 
•077 
•345 
Approx, starboard angle ... 
l‘’-55 
27‘’-56 
31'’-93 
31‘’-27 
Observed 
deviation 
uncor- 
rected. 
Residual 
error. 
Observed 
deviation 
uncor- 
rected. 
Re.sidual 
error. 
Observed 
deviation 
uncor- 
reeted. 
Residual 
error. 
Observed 
deviation 
u 11 cor- 
rected. 
Residual 
error. 
P 
r 0 
1 
2 
3 
4 
5 
6 
7 
8 
'i 9 
^ 10 
M 11 
12 
« 13 
"s 14 
J 15 
1 i 16 
.§ 17 
18 
^ 19 
2 20 
21 
^ 22 
23 
24 
25 
26 
27 
28 
29 
30 
1^ 31 
O ^ 
+ 1 0 
+ 2 30 
+ 3 20 
+ 3 20 
+ 3 40 
+ 4 0 
+ 4 10 
+ 3 20 
+ 2 30 
+ 1 40 
+ 0 40 
+ 0 30 
-0 20 
— 0 45 
-0 45 
-0 50 
— 0 50 
— 0 40 
— 0 20 
-0 40 
-0 30 
— 1 0 
— 1 20 
— 2 0 
-2 30 
— 3 0 
-3 20 
-3 30 
-3 0 
-2 0 
— 1 30 
0 0 
( + 0 7) 
+ 1 7 
-hi 30 
+ 1 8 
+ 1 11 
-hi 18 
-hi 22 
-hO 33 
(-0 11) 
— 0 47 
— 1 30 
— 1 17 
-1 40 
-1 34 
-1 2 
-0 35 
(-0 3) 
+ 0 37 
+ 1 24 
H- 1 26 
+ 1 53 
-hi 36 
-hi 22 
-fO 41 
( + 0 5) 
-0 39 
-1 16 
-1 49 
— 1 46 
-1 17 
-1 19 
-0 21 
O f 
— 5 0 
— 5 0 
— 3 0 
! 0 0 
-fl 20 
-hO 15 
-hO 10 
-hO 40 
0 0 
-hO 40 
-hO 20 
-hO 10 
-t 0 10 
-hO 10 
-hO 10 
— 1 0 
— 1 40 
- ] 0 
— 0 40 
-0 30 
0 0 
-1 30 
-2 30 
— 1 30 
— 2 10 
-3 0 
— 1 30 
— 3 20 
-5 30 
— 5 0 
-5 50 
-5 0 
(-1 41) 
— 2 0 
— 0 22 
-h2 14 
+ 3 7 
-hi 35 
+ 1 3 
+ 1 9 
( + 0 7) 
+ 0 29 
— 0 5 
— 0 25 
-0 30 
-0 29 
— 0 24 
-1 23 
(-1 49) 
-0 50 
-0 8 
-hO 26 
-hi 23 
H-O 20 
-0 13 
-hi 11 
(-hO 53) 
-hO 21 
-h2 5 
-hO 25 
— 1 40 
— 1 11 
— 2 6 
— 1 27 
o / 
— 0 40 
-hO 20 
-hi 20 
+ 2 20 
-h3 10 
-h3 40 
-h2 50 
-h3 30 
-h4 10 
-h4 30 
-h4 40 
4-3 30 
4-3 20 
4-2 0 
4-1 30 
4-0 20 
0 0 
-1 0 
— 1 50 
— 3 10 
— 3 50 
— 4 10 
— 4 10 
-4 50 
-4 30 
— 4 25 
— 4 10 
-4 0 
-3 0 
— 2 40 
— 1 40 
-1 0 
( — 6 21) 
— 0 13 
-0 3 
-hO 10 
4-0 19 
4-0 16 
-1 0 
— 0 35 
(-0 1) 
+ 0 23 
-t-0 48 
+ 0 1 
4-0 24 
-0 16 
-fO 1 
-0 20 
(4-0 11) 
4-0 3 
4-0 3 
-0 30 
-0 29 
— 0 16 
4-0 10 
-0 15 
(+0 11) 
-hO 12 
4-0 12 
-0 1 
4-0 26 
4-0 6 
4-0 19 
-hO 10 
— 2 55 
-h 3 40 
4- 9 13 
4-12 32 
4-15 50 
+ 17 40 
+ 19 30 
+ 19 5 
+ 18 40 
+ 17 15 
+ 15 50 
4-14 10 
+ 12 30 
+ 11 30 
+ 9 20 
+ 5 55 
+ 2 30 
0 0 
— 2 30 
— 5 50 
— 9 10 
-11 52 
-14 35 
— 16 47 
-19 0 
-20 22 
-21 45 
— 22 10 
— 20 0 
— 16 30 
-13 0 
- 7 32 
(-0 7) 
+ 2 35 
+ 4 20 
+ 3 57 
+ 3 52 
+ 2 46 
+ 2 12 
+ 0 3 
(-1 21) 
— 2 57 
— 3 45 
— 4 1 
-3 35 
— 1 53 
— 0 51 
— 0 44 
(-0 22) 
+ 1 1 
+ 2 21 
+ 2 41 
+ 2 44 
+ 2 58 
+ 2 39 
+ 2 11 
( + 0 57) 
— 0 14 
— 2 14 
— 4 3 
-3 59 
-3 11 
-2 53 
-0 57 
Quadrantal coefficients ...<|^ 
1 
L 
-hi 38 
— 1 41 
-hi 48 
— 1 41 
-hi 21 
— 0 33 
-hO 26 
— 0 43 
o / 
— 0 13 
4-0 12 
-0 15 
4-0 17 
+ 3 57 
- 3 33 
+ 3 19 : 
-3 30 i 
Mean quadrantal coefficient 
-hi 42 
-hO 46 
— 0 14 
-j- 3 35 1 
True modulus .; ' ‘049 
•040 
•077 
•352 
True starboard angle ' l'’*49 
27'’-60 
31 ”•93 
31‘’-33 
