THE RESULTANT PRESSUKK liKCORDER 



21 



Table IV— October 1, 1888. 



P. W. Very, Conducting experiments ; Joseph Ludewig, Assisting. 



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

 rotation; barometer, 732.3 mm.; temperature 10:15 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 the-e experiments both the velocity of the wind and its direction were quite variable. 



