482 



METEOROLOGICAL REPORT, 1871, BY THE 



In this table the figures given for Alnwick and Durham are 

 equivalent to the velocity in miles per hour at those stations 

 printed on a later page. It is therefore the average force 

 throughout the twenty-four hours of the day. At all the other 

 stations the force given is the average force at the time of ob- 

 servation, generally 9 or 10 a.m. The difference, as will be 

 seen, is very striking. Alnwick and Durham are omitted in 

 calculating the average given in the last line. In the general 

 table the force of wind given for Alnwick is similarly the aver- 

 age force throughout the twenty-four hours, and is omitted in 

 the same way in calculating the average in the last line. 



The editors have been favoured with several interesting par- 

 ticulars from different stations which it has not been possible to 

 include in the general table. 



Among these is the following furnished by Mr. J. J. Plummer, 

 of the Observatory, Durham. 



Relative Prevalence of Wind from Different Quarters, at Durham 

 Observatory, 1871. 



QUARTERS. 



Times noted. 



Percentage of 

 whole. 



Average Percentage 

 of whoie for 4 years. 



North 



75 



73 



70 



28 



174 



105 



122 



70 



13 



10-27 



10-00 



9-59 



3-84 



23-84 



14-38 



16-71 



9-59 



1-78 



9-35 



9-38 



7-38 



3-87 



22-97 



14-20 



18-79 



10-79 



3-23 



North-East 



East 



South-East 



South 





West 



North -West 







The observations, on which the above is founded, were made 

 twice every day throughout the year, or seven hundred and 

 thirty times in all. 



Mr. Plummer has also forwarded a return of the mean velo- 

 city of the wind per hour for each month of the year, which is 

 combined in the annexed table with similar information kindly 

 furnished to the Club from Alnwick Castle. 



