distribution , &c. of the magnetic intensity in ships of war. 339 
the vessel arose from the iron tiller, and the knees and 
braces employed in securing the stern. The increased in- 
tensity of the three last mentioned stations, above the five 
which preceded them, may be attributed to the chain cable, 
which commenced at L", and to the galley, which was oppo- 
site to M". 
In the same section also, on the lower deck, the maximum 
■ intensity was observed at Li", in the same transverse section 
as the maximum intensity of the middle section on the same 
deck, the corresponding intensity of the larboard section on 
the main deck, and a similar intensity of the starboard section 
on the upper deck. The least intensity likewise was found 
at H ", in the prolongation of the after part of the shot-locker, 
and in the same vertical transverse plane as the minimum 
intensity of the middle section, and the greatest intensity of 
the larboard section on the same deck. 
At the stations m! , n! , in the larboard section on the upper 
deck, a close approximation to equality was perceptible in 
the observed intensities ; and at the corresponding stations 
M', N', in the other lateral section, a perfect equality was 
found. At the remaining stations in those sections, however, 
no analogy could be traced among the results. The maximum 
intensity was found at d , in the same transverse plane as the 
least intensity of the middle section on the main deck ; and 
the minimum intensity at CX, in the same plane as the least 
intensity of the middle section on the upper deck. 
In the same section, on the main deck, the intensities were 
no less remarkable, when contrasted with the results of the 
starboard section on the same deck. The greatest intensity 
was found at l ", in the same vertical plane as the maximum 
