Relative Humidity. 



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Annual Variation of the Relative Humidity. — The relative humidity is a minimum in April and May, and 

 a maximum in December and January. The following are the means for the meteorological seasons : — 



Winter, Dec, Jan., Feb., 0-919 



Spring, March, April, May, 0-790 



Summer, June, July, Aug., 0'815 

 Autumn, Sept., Oct., Nov., 0-861 



The mean relative humidity for 1844 — 0-846. 



TABLE XV. — Mean Relative Humidity, Saturation being = 1, with reference to the Moon's 



Age and Declination. 



Humidity with reference to the Moon's Age. — The following means of groups indicate that the humidity 

 was greatest a few days after full moon, and least between new moon and full moon : — 



12 days till 18 days. Full Moon, 0-845 



15 22 - 0-849 



19 26 - 0-844 



23 29 — 0-842 



27 days till 3 days. New Moon, 0-837 



7 — 0-835 



4 11 ... 0-836 



8 14 ... 0-835 



The results for 1843 and 1844 agree in making the humidity greatest about the third, and least about the 

 first quarter. 



Humidity with reference to the Moon's Declination. — The means of groups are — 



25 days till 3 days. Moon farthest North, 0-835 



6 ••. 0-833 



4 10 — 0-846 



7 13 - 0-853 



11 days till 17 days. Moon farthest South, 0-837 



14 20 - 0^835 



18 24 — 0^841 



21 27 ... 0-838 



These means indicate a maximum before the moon is farthest south, and a minimum after it is farthest 

 south. The result does not agree with that for 1843. 



MAG. AND MET. DBS. 1844. 



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