THE RESULTANT PRESSURE RECORDER 



21 



Table IV.— October 4, 1888. 

 F. W. Very, Conducting experiments ; .Joseph Ludewig, Assistinfj. 



Wind i^lane, 1 foot square (929 square centimeters); center of wind plane, 9 m. from axis of 

 rotation ; barometer, 732.3 mm. ; temperature 10:1.5 a. m., 48° F. ; 2:30 p. m., 56° F. ; mean 

 temperature, 52° F. = 11°. 1 C. ; mean wind velocity, 0.85 meters per second. 



During these experiments both the velocity of the wind and its direction were quite variable. 



