distribution , &c. of the magnetic intensity in ships of war. 315 
Table of Mean Intensities. 
Direction of the 
Ship’s Head. 
Larboard 
Section. 
Middle 
Section. 
Starboard 
Section. 
1 
1 
Mean of the 
three Sections. 
Poop. 
North, 
East, 
North-west, 
101.19 
90.76 
101.70 
101.96 
97-88 
98.64 
102.77 
93-14 
IOI.78 
101.97 | 
93-93 
IOO.71 | 
Forecastle. 
North, 
East, 
North-west, 
98.44 
91.56 
103.86 
96.87 
9545 
101.89 
106.30 
104.28 
104.31 
100.54 
97-10 
103.35 
Upper Deck. 
North, 
East, 
North-west, 
98.51 
100.90 
99-55 
94.45 
96.37 
96.46 
98.51 
93.23 
102.72 
97.15 | 
96.83 
99.58 
Lower Deck. 
North, 
East, 
North-west, 
99-77 
88.26 
107.34 
93.56 
98.16 
94.03 
95.83 
106.70 
92.40 
96.39 
97.71 
97.92 
If the preceding results be examined, it will be found that 
on the poop, and forecastle, the mean intensities of the three 
sections were the least, when the ship's head bore east ; and 
the same property will be also found to exist in the star- 
board section of the upper deck, and the larboard section of 
the lower. But in the larboard and middle sections of the 
upper deck, and the middle section of the lower, they were 
