352 Mr. Harvey’s experimental enquiries relative to the 
being 97 89, and the latter 97-13- It is proper to add, that 
this vessel had not her lower deck guns on board.* 
As examples of the diversities of intensity existing in dif- 
ferent ships at stations similarly chosen, and determined by 
the same instrument, the following are selected. The pri- 
mary position assumed in each vessel was that of the bin- 
nacle, as A, Plate XIX., fig. 4. The right line MN, which 
passes through this point, is supposed to denote the principal 
axis of the ship, M being the after part, The lines CD, EB, 
which likewise pass through A, and form angles of 45 0 with 
the axis, are each 16 feet in length. At the extremities of 
those lines, and also at the station A, the intensities were de- 
termined by a mean of six experiments, and the results are 
recorded in the following table. The oscillating bar was 
elevated in each case at the constant height of 20 inches 
above the deck. 
Caledonia, 
1 20 guns. 
St. Vincent, 
120 guns. 
Malta, 
84 guns. 
Cornwallis, 
74 g uns - 
Nereus, 
46 guns. 
Melampi 
46 guns 
1 
Stations. 
Intensity. 
Direction 
of the 
Ship’s 
Head. 
Intensity. 
Direction of 
the Ship’s 
Head. 
Intensity. 
Direction of 
the Ship’s 
Head. 
Intensity. 
Direction 
of the 
Ship’s 
Head. 
Intensity. 
Direction of 
the Ship’s 
Head. 
Intensity. 
Direc 
the 
H 
jn of 
jiip’s 
id. 
A 
IOI.74 
N by E 
104.49 
SWbyS 
94-39 
SE 
89.74 
SSW 
96.95 
N by W 
IOO.95 
SI 
W 
B 
108.97 
N by E 
102.64 
S by W|W 
102.07 
SE by S|E 
80.37 
SSW 
107.98 
N by WJW 
IO5.92 
S bypiW 
C 
103.68 
N by E 
99.08 
ssw 
90.02 
SE by S 
97-48 
SSW 
IOO.84 
NNW 
96.64 
S 

D 
lo 5-43 
N by E 
ICO.62 
S by W 
106.51 
SE byS 
99.85 
SSW 
103.44 
NW byN 
IO4.26 
Jj 
W 
E 
0 
! ew 
0 
N by E 
98.01 
S by W 
97.29 
SE by S|E 
96.12 
ssw 
95.40 
NW 
IO4.96 
Mean 
104.58 
Mean 
100.97 
Mean. 
98.06 
Mean. 
92.71 
Mean. 
IOO.92 
Mean. 
102.55 
* The assistance f received from the officers of the Impregnable, in enabling me 
to obtain suitable stations for determining the intensity, demand from me the 
warmest acknowledgments. 
