INTRODUCTION XXV 



Mean 3Ionthly Reading for 

 33 years. 



January 37-28 



February 38. 57 



March 3919 



April 43-70 



May 48.20 



June 54-26 



July 57-20 



August 56.55 



September 53-29 



October 47-48 



November 40.66 



December 38.18 



The general yearly mean amount of Ozone registered for a period of 

 twenty-one years at the Radcliffe Observatory is 2.4. 



The yearly sum of bright sunshine is in hours as follows — 1881, 

 1546-8 hours ; 1882, 1461-4 ; 1883, 1465-3 ; 1884, 12609 I 1885, 1434*3 ; 

 1886, 1368-1 ; 1887, 1581-5 ; 1893, 1765 hours. These observations 

 were obtained at the Radcliffe Observatory by means of a Campbell- 

 Stokes sphere sunshine recorder, which is placed on the top of the 

 tower, at a height of 100 feet from the ground. 



The mean direction of the wind for the year 1887 is 276° 57', or 

 nearly W. by N. It may be noticed that the whole horizontal motion 

 of the air during the same year was 102.851 miles. 



The following measurements of the rainfall of Berkshire ai'e obtained 

 from Symon's Yearly Reports of the British Rainfall, which should 

 be consulted by those desiring fuller information. 



Faringdon, 340 feet 

 above sea . 



Denford Park, near 

 Hungerford,430 ft. 



Wellington Coll., 

 283 feet .... 



Yattendon, 440 ft. 



Newbui'y, 260 feet 



Reading, 154 feet 



Wallingford, 175 ft. 



Maidenliead, Cook- 

 ham, 90 feet . . 21.26 27.44 27.95 19.32 22.92 22.21 21.83 28.15 21.86 19.70 



The number of daj^s on which rain fell at the following stations in 

 Berkshire is also taken from Symon's Year Books. 



