76 Meteorological Summary for 1830. — Hampshire. 



Bakometuical Pressure.— The mean pressure this year is 

 -5-l^-i^ of an inch higher than the mean of the last fifteen years ; but 

 the number of changes is less than in any year in that period. 



On the 19th of January a depression of 1-05 inch of mercury 

 occurred, with a strong wind, first from South-east, and then from 

 the North-east, accompanied with a heavy fall of snow. 



The mean of the pressures at 8, 2 and 8 o'clock coincides with 

 the annual mean pressure. 



Temperature. — The mean temperature of the external air this 

 year is lower than that of any year since 1816. The mean tem- 

 perature of January and the first part of February was very low, 

 and we have never registered so low a degree of temperature as 

 that which occurred in the night of the 2nd of February. There 

 is a ditference of half a degree between the annual mean tempera- 

 ture at 8 A.M. and 8 P.M., the latter being the highest. The 

 annual mean temperature of spring-water this year is the lowest 

 during the last ten years. 



Winds. — The duration of the South-west wind this year is un- 

 precedented, being more than one-fourth of the period ; the wind 

 from the West is the next in duration ; but that from the South 

 has prevailed the least number of days. 



The North-east and South-east winds are equal in point of time. 



The number of strong gales of wind, or days on which they have 

 prevailed this year, is as in the following scale : 



January was very cold and cloudy, with frequent falls of snow ; 

 it having snowed more or less on fifteen days. 



February was rather dry and mostly frosty, with a cloudy atmo- 

 sphere, and occasional gales of wind. The minimum temperature 

 in the night of the 2nd was the lowest that had occurred the last 

 fifteen years. 



March was fine, calm, and very dry, and a high pressure pre- 

 vailed the latter part of the month, when the spring began to open. 



April commenced with a snow-storm for several hours, and was 

 alternately fine and showery, with frequent strong gales. In the 

 night of the 4th the frost was severe, and did much injury to the 

 bloom of the trees in open situations. Vegetation was checked the 

 first part of the period by the cold nights and hoar frosts ; but 

 the warm rains, followed by clear sunnj' days during the latter part, 

 caused a rapid growth. 



May was dry and pleasant, with much warm sunshine till the 

 20th, when the air became arid and bliglity, and the roads very 

 dusty, insomuch that vegetation began to droop. The latter part 

 of the month was showery, accompanied vvith strong gales. 



June was cold, showery and windy. The crops of grass, from 

 the nature of the weather in the spring, were generally abundant ; 



but 



