distribution, &c. of the magnetic intensity in ships of war. 343 
have on the rates of chronometers. To afford some idea of 
the diversified nature of these intensities, the following re- 
sults have been selected from many others, and which suffi- 
ciently prove that the action of induced magnetism in this 
part of the vessel is subject to the most singular and re- 
markable variations. 
Experiments 
in the Captain’s Cabin. 
Larboard Section. 
Middle Section. 
Starboard Section. 
Direction 
Station. 
Intensities . 
of the 
Stations. 
Intensities. 
of the 
Stations. 
Intensities. 
of the 
Ship’s Head. 
Ship’s Head. 
Ship’s Head. 
a" 
92.31 
ENE 
ca' 
97.90 
Eby IN 
A" 
« 37-38 
E by N 1 N 
b" 
71.07 
' EJN 
0 " 
108.47 
SE by E \ E 
B" 
*54-36 
SE by E \ E 
c" 
79-35 
NE by E 
y'' 
107.36 
NE byE 
C" 
128.15 
ENE 
d" 
89.83 
NE by E 
S" 
98.87 
NEby E 
D" 
127.84 
NEf E 
e" 
80.45 
E by N 
108.22 
EbyN^N 
E" 
126.89 
EfS 
Mean 
82.60 
Mean 
104.16 
Mean 
134 - 9 * 
At the time the above experiments were performed, the 
iron tiller was exactly amidships; and the iron knees and 
braces round the stern and sides of the ship appeared to be 
so equally distributed, that it seems difficult to account for 
the different intensities recorded in the table, on any other 
principle than as arising from the constant fluctuations of the 
ship’s head. That this at least is one of the primary causes 
of the observed anomalies, will be rendered exceedingly 
probable, from some observations which will be speedily 
advanced. Of the starboard section it may be remarked, 
that all the results very much exceed the assumed ter- 
restrial intensity ; but in the middle section, at two of the 
