342 Mr. Harvey's experimental inquiries relative to the 
The intensities also in the line of stations assumed in the 
middle section on the main deck, approached much nearer a 
state of uniformity than those of any other ; the difference 
between the greatest and least intensities being only 10.57 ; 
whereas the difference on the same deck, in the starboard 
section, amounted to 61.86, and in the larboard section 50.21. 
In these sections also the greatest uniformity was percepti- 
ble on the upper deck. 
It is worthy of remark, moreover, that the mean intensities 
of the stations in the middle section on the different decks, 
accord very nearly with the means of the greatest and least 
intensities in the same section on the same decks ; — a prin- 
ciple not to traced in the other sections. 
By considering the different results according to the order 
of the sections on the same deck it will be perceived, that 
the mean intensity on the upper deck increases in a small 
degree from the starboard to the middle section, from which 
it undergoes a more considerable decline to the plane on the 
larboard side ; but on the main deck, the average intensity 
decreases rapidly from the starboard to the middle section, 
and from thence, by a less rapid diminution, to the larboard 
plane. On the lower deck, however, the case is the reverse ; 
the mean intensity being the least in the starboard section, 
from which it increases to the middle section, and finally 
attains its maximum in the larboard section. 
The diversities however which exist in the intensities at 
the corresponding stations of the three sections abaft the 
mizen mast, merits a particular examination, on account of 
the effects which such varied and uncertain influences must 
