32o Mr. Harvey’s experimental inquiries relative to the 
sections of the poop ; in the three sections of the forecastle ; 
in the starboard section of the upper deck, and in the middle 
and larboard sections of the lower deck, the stations at which 
the greatest and least intensities were respectively found, 
when the bow of the vessel was due north, still main- 
tained the same property when her head was afterwards 
moored north-west ; but in the larboard section of the poop, 
and the starboard section of the forecastle, the same princi- 
ple was only found to hold good when the bow of the ship 
bore due east. In the middle and larboard sections of the 
upper deck, however, the points of maximum intensity were 
found to preserve their situations in the northern and north- 
western positions of the ship ; but the points of minimum in- 
tensity were observed to change, approaching nearer the 
bow in the latter situation. A similar property with respect 
to the least intensities, was also found in the middle and star- 
board sections of the lower deck, when the vessel was moored 
with her head to the north and east. It may also be re- 
marked, that in the two positions of the vessel last alluded 
to, the points of greatest and least intensity mutually ex- 
changed places at some of the stations ; the point of maximum 
intensity in the northern position of the ship becoming in 
the eastern that of minimum intensity, and the converse. 
These singular changes were observed in the middle and 
starboard sections of the poop ; the middle and larboard sec- 
tions of the forecastle, and the larboard section of the upper 
deck. The station y{" in the middle section of the lower 
deck preserved its minimum intensity in each position of the 
vessel. 
The situation of the binnacle was nearly mid-way between 
