Quantity of Rain. 445 



after it. The epochs of maxima and minima from Table XLI. for the year, and for each of the astronomical 

 quarters (for which November, December, and January, constitute winter), are as follow : — 



w * , ^T Qh 1 n™ f Min. Oh 30" P.M. "1 f Min. lOh 10™ p.m. "l „. ,„ , „ 



A^mter, +Ma-^. SMO- a.m. ( Max. 2M0™ p.m. J | Max. 1^ 10" a.m. J M'°- 4" 10- a.m. 



Spring, 1M0".P.M. [?J^- }^'|^" "•*'•) Min. 4» 10- A.M. 



^ ^ l^ Max. 12" 10- A.M. J 



Summer, 8" 40- a.m. Min. 12" 10- a.m. 



^"*— 1^10-- {MiS;s:i:M>- ^^10-- 



Y-. 9M0-A.M. {£•.'?" is: I:m;}^^- 4mo-a.m. 



In winter and summer, the principal maximum of the extent of clouded sky occurred about 8" 30™ a.m. ; 

 in spring and autumn, about 1" 10™ p.m. In winter, spring, and autumn, there are nearly equal minima about 

 10" P.M. and 2" to 4" a.m., with a secondary but indistinctly-marked maximum between. In winter, there is a 

 secondary minimum about noon, with a secondary maximum about 2" 40" p.m. 



In the mean for the year, the sky was most clouded about 9'^ 40— a.m., and least clouded from 8" p.m. till 

 4'' a.m. 



The Ranges of the Hourly Means for each Month are as follow : — 



Jan. Feb. March. April. May. June. July. Aug. Sept. Oct. Nov. Dec. 



2-9 2-5 2-8 1-9 2-2 1-7 2-5 1-9 2-1 23 2-8 1-9 



The ranges are, on the whole, least for the summer months, and greatest for the winter months. The 

 ranges of the hourly means for the astronomical quarters and year are — 



Winter,,.. 1-6. Spring,... 1-5. Summer,... 1-7. Autumn,.. . 1-5. Year 1844,... 1-3 



So that, when the hourly means for three months are considered, the variation of the extent of clouded sky 

 during the day is nearly the same for each quarter of the year. 



Quantity op Eain. 



TABLE XLII. — Quantity of Eain for each Month for 1844, by the Observatory, Garden, and 



Greenhouse Gauges. 



The funnel-mouth of the observatory rain-gauge is 8 inches above the sod ; that of the garden-gauge, 6^ 

 feet above the soil, and that of the greenhouse-gauge is 18 feet from the ground. The observatory-gauge is 

 218 feet, the greenhouse-gauge is 192 feet, and the garden-gauge is 171 feet, above the level of the sea. 



MAG. AND met. OBS. 1844. 



5u 



