72 



KENNELLY-SANBORN— INFLUENCE OF 



[April 24, 



Table III shows the value of k' in formulas (7) and (8) for the 

 various series of measurements appearing in this report at the velocity 

 v== 1,000 cm. per second. It will be seen that k' varies between 1.76 

 and 2.50, with a mean value near 2.0. 



Anemometer Measurements. 



A wind-velocity measuring apparatus, or electric anemometer, 

 was constructed of the same thin platinum wire as that used in the 

 preceding tests (0.114 mm. diameter). A length of 25 cm. of this 



Fig. II. Experimental Anemometer. 



wire (10 in.) was supported vertically, between insulated clips, in a 

 steel G frame shown in Fig. 11. Pressure taps, of the same size 

 platinum wire, were soldered on to the vertical test-wire, at a distance 



