Journal kept at Port Stephens. 467 
inches; the former pressure taking place in the month of July, 
1846, and the latter in July, 1847; the difference being 1-372 
inches. The greatest annual range occurred in the year 1846, 
and the least in 1845; the former being 1-338 inches, the latter 
1-090 inches: the greatest monthly range during the whole 
period was (July, 1846) 1-338 inches; the least, (March, 1846) 
0-490 inch. The pressures in the tables have all been reduced 
to the temperature of 32°, but not for capillarity, nor reduced to 
the level of the sea. 
The diameter of the tube of the barometer being 0 282 inch, 
the correction for capillarity is + -016. Compared with the 
barometer belonging to the Royal Society at Somerset House it 
stood 0505 inch lower than the Royal Society’s barometer. 
The average pressure for nine a.m., noon, and three p.m., will 
be respectively— 
Nine a.m., pressure . 
.. 29-9667 
Correction for capillarity. 
. + -016 
Reduction to level of sea, viz. 46 feet 
.. + -0525 
30-0352 
Noon, pressure . 
.. 29-9381 
Correction for capillarity . 
. + -016 
Reduction to level of sea, viz. 46 feet 
.. + -0525 
30-0066 
Three p.m., pressure . 
.. 29 9024 
Correction for capillarity . 
+ -016 
Reduction to level of sea, viz. 46 feet 
..+ -0524 
29-9708 
Atmospheric Tide .—For the whole period the mean atmos¬ 
pheric tide was 0-0643 inch; the mean maximum occurring in 
•he month of November, -0776 inch, and the mean minimum in 
June, -0435 inch. 
