158 Meteorological Summary for 1823. — Hampshire. 



a degree; and the mean at 8 A.M. and 8 P.M. within a quar- 

 ter of a degree. 



The annual mean temperature of spring water, as taken at 

 8 o'clock A.M., coincides with the annual mean temperature 

 of the external air within ~^rths of a degree. The difference 

 between the mean temperature of the air and that of spring 

 water for the last three years does not amount to three quar- 

 ters of a degree; which serves to point out the analogy there 

 is between the mean temperature of the air and that of the 

 ground. 



The mean state of the air by De Luc's whalebone hygro- 

 meter, this and the preceding year, coincides within T \jth of a 

 degree. 



Wind. — In comparing the scales of the prevailing winds 

 for 1822 and 1823, there will be found a remarkable coinci- 

 dence, the greatest difference in point of numbers, from the 

 eight divisions of the compass, being only 9^ days, which was 

 minus in the south-east wind. The south-west wind, which 

 frequently comes across the Atlantic Ocean, has been more 

 prevalent this year than for the last nine years, and the most 

 prevalent for the three preceding years. The following is the 

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

 prevailed this year, viz. 



Hence it appears that the south-west wind here, is not only 

 the most prevailing in light breezes, but in brisk and strong 

 gales ; which is also generally observed at sea. 



Clouds. — Of these the cirrostratus was the most prevalent, 

 and the cirrus, from which it is produced, the next: but it is 

 impossible that we can always perceive the cirrus in its descent, 

 before it is transformed into cirrostratus ,- because, in the ab- 

 sence of the sun, or when it is under the horizon, the cirri 

 quickly descend, and put on the appearance of linear ci?T0- 

 strati. The cirrose crowns of nimbi are not noticed here, but 

 are included in the latter modification. In a series of years 

 the cirrus and nimbus are pretty equal in the numbers of their 

 appearance, or days on which they have prevailed. 



Weather. — The difference in the cloudless and fair days 

 this year and last, is 31 days; and the difference in the over- 

 cast and rainy, is 30 days: both in favour of 1822. 



Atmospheric Phenomena. — Nothing peculiar in the ap- 

 pearance 



