on the Marine Barometer. 259 
high, if not higher, than one from the SE ; and that a north- 
west wind, where it came from off the sea and was moderate* 
was equal to either of them, and kept it up higher than the 
south-west wind did. 
In order to have ascertained the full effects of sea and land 
winds upon the barometer, it was desirable to have learned, 
whether the south-east winds, which occasioned the mercury 
to rise highest upon the south and east coasts, would have left 
it at the medium standard, or made it descend upon the north- 
west and west coasts of Australia ; but, unfortunately, the 
state of the ship did not permit me to determine this ; for at 
the distance we kept from these coasts, in making the best of 
our way to Port Jackson, the accumulation of air over the 
shore, arising from a sea wind, or the contrary from a land 
wind, can scarcely be supposed to have much, if any effect. 
The principal winds we experienced between Timor and Cape 
Leuwen, in the months of April and May, were from SE and 
SW. The south-east wind prevailed as far as the latitude 25 0 , 
and the mercury stood at first with it at 29,95 ; but as we 
advanced southward, it rose gradually to 30,25, nearly in the 
same way as it had before descended on the east side of 
Australia, when we steered northward in the month of Oc- 
tober. This wind was succeeded by an unsteady northwardly 
wind, which brought the mercury down to 29,90 ; but on its 
veering by the west to SW it rose fast, and fixed itself about 
30,32 : we were then drawing near Cape Leuwen. 
As far as this example can be admitted in proof, it appears, 
that a wind from the SW has an equal, if not a superior power 
to one at SE in raising the mercury upon the west coast; 
v/hich was not the case upon the south, and son mucn less 
