THE COUNTERPOISED ECCENTRIC PLANE. 



93 



September 22, 1888. 



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



Barometer, 738.4 mm. ; temperature, 15.°5 C. ; wind velocity, 2.06 meters per second. 



^leteorological conditions not so favorable as on the 21st, the wind being rather strong. The 

 effect is to j^roduce a much wider oscillation of the trace. 



