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THE ROYAL SOCIETY OF CANADA 



The tubing connecting the head of the pressure tube with the recorder 

 was one half inch in diameter, and about 50 feet long. 



In working up the results, the pressure tube anemometer (un- 

 corrected) was taken as the standard and the mean velocity for each 

 hour was easily obtained from the chart by estimation. The velocities 

 were divided into groups according to the limits of velocity of each 

 number on the Beaufort scale of wind force, the cup anemometer 

 reading for the same hour was obtained and placed in the same group. 



The average for each group was obtained for each month and then 

 a final mean from the monthly results; these final mean values of the 

 pressure tube readings were then corrected according to the factor 

 given by Fig. 2. The results are given in Table III. 



Table III 



P = Pressure Tube Anemometer. 



A = Canadian Standard Anemometer. 



