THE RESULTANT PRESSURE RECORDER. 



19 



Experiments with the Resultant Pressure Recorder to determine the resultant pressure, on a square 

 plane moved through the air with different velocities and different inclinations. 



Table II.— August 27, 1888. 



S. P. Langley, Cunductlng experiments; F. W. Very, Assistinij. 



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

 rotation ; barometer, 736 mm. ; temperature at 6 p. m., 21°.0 C. ; mean wind velocity, 0.52 meters 

 per second. 



