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EXPERIMENTS IX AERODYNAMICS. 



Ezp< riments to dt U rmine the position of the center of pressure on an incliru d square plane. 



September 21, 1888. 



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



Barometer, 737.06 mm. ; temperature, 18° C. ; wind velocity, 0.006 meter per second ; length 

 of side of wind-plane. 12 inches (30.5 centimeters). 



