278 ABSTRACTS OF THE MakERSTOUN OBSERVATIONS, 1843. 
Atmospheric Pressure with reference to the Moon’s Age.—From the means in the Table, and the following 
means of groups, it is distinctly evident that a maximum of pressure occurs about two days after full Moon, 
and a minimum of pressure about two days after new Moon; the same result has been obtained, Table X., for 
that portion of the atmospheric pressure due to the aqueous vapour. : 
12 days till 18 ae Full Moon, 29°668 days till 3 ane New Moon, 29-576 
Ma soacaee 22 ‘GO ao F een nse. 7 “552 
LOW DATs rb. 662 4 ane Tlie 609 
QS) Msecuss DON cite 608 8 cece Ld iz. 668 
Atmospheric Pressure with reference to the Moon’s Declination.—The means in the previous Table, and in 
the following means of groups, indicate two maxima and two minima, The principal maximum occurs about 
two days before the Moon is on the equator moving northwards; the two minima are nearly equal, the one 
oceurring when the Moon is farthest north, the other about two days before it is farthest south ; the secondary 
maximum occurs about one day before the Moon is on the equator moving southwards, 
25 days till 3 cat Moon farthest North, 29:584 11 days till 17 aid Moon farthest South, 29-599 
Q) rere 6 605 140k 20 684 
ac LORI: 640 180 e.2 oe Te 669 
Womanceset Sma. ‘579 De tANS.8 Bh v5. 625 
TABLE XVII.—Diurnal Range of the Barometer for each Civil Day, with the Weekly and 
Monthly Means for 1843. 
Mean 
