Meteorological Siummary fur 1822. — Hampshire. 155 



Least monthly quantity in January . . . 0'95 



Total amount for the year ■iQ'lS 



Rain. 

 Greatest monthly quantity in November . 7.500 

 Least monthly quantity in June .... 0'385 

 Total amount for the year near the ground 33'487 

 N. B. The barometer is hung up in the observatory 50 feet 

 above low-water mark ; and the self-registering horizontal day 

 and night thermometer, and De Luc's whalebone hygrometer, 

 are placed in open-worked cases, in a northei'n aspect, out of 

 the rays of the sun, ten feet above the garden ground. The 

 pluviameter and evaporator have respectively the same square 

 area : the former is emptied every morning at 8 A.M. after 

 rain, into a cylindrical glass gauge accurately graduated tOyi^th 

 of an inch ; and the quantity lost by evaporation from the latter 

 is ascertained at least every third day, and sometimes oftener 

 when great evaporations happen by means of a high tempera- 

 ture and dry northerly or easterly winds. 



BAnoMETRicAL PRESSURE. ^The mercurial column this 

 3'ear has shown no unusual elevation nor depression : it has 

 not fallen so low by f^jths of an inch as in 1821. — The mean 

 pressure is JJ^ths of an inch higher than that of the last year, 

 and Jjj''yths of an inch higher than the mean of any year smce 

 the close of 1814 ; but the aggregate of the spaces desci'ibed 

 by the alternate rising and falling of the mercury is ll]-th 

 inches less. This high mean pressure, which will no doubt 

 be found by every meteorologist to have obtained this year, 

 may be justly attributed to the fine dry weather the first half 

 of the year. For 1 70 days that the moon had a North decli- 

 nation, the mean pressure was only yiyth of an inch higher 

 than that in the 183 days of her South declination. So equal 

 an aimual pressure with the moon on each side of the Equi- 

 noctial, does not obtain in very wet years, as in 1816 and 1821. 



Tempeuatl'ue. — The mean temperature of the external air 

 a few feet from the ground, is higher than that of any other 

 year during the last eight years, and lj° higher than the warm 

 3'ear 1818. This is the result of a remarkably mild winter and 

 spring year. The winter and s})ring months are also stated to 

 have been very mild, with a humid air in the northern parts of 

 Europe; while in the several countries of South America the 

 cold was so unusually severe, as to have been considered a 

 mostextraoidinary pluTenomenon in the climate of that country. 

 It is a remarkable circumstance in our climate when the 

 monthly mean temperature is highest in June by fgths of a 

 degree : such, however, was the case this year, an anomaly 

 which we have not before experienced in the course of our 



U 2 thermo- 



