10 



G. I. TAYLOE ON EDDY MOTION IN THE ATMOSPHERE. 



In Table I. the values of z and t observed in the " Scotia " kite ascents are given. 

 In the first column is given the date of the ascent, in the second column the height 

 of the bend in the temperature-height curve, in the third column the interval between 

 the time of the change in the temperature conditions which give rise to the bend in 

 the temperature-height curve and the time of the ascent, and in the fourth column 

 are given values of %(wd) in C.G.S. units, calculated from the equation %(wd) = z*lt. 



TABLE I. 



It will be seen that the values of ^ (wd) vary through a large range. It is to be 

 expected that the amount of eddy motion will depend on the wind velocity ; accord- 

 ingly, a fifth column has been added to show the average wind force during the 

 time t. The figures in this column are the means of the Beaufort wind-force numbers 

 recorded at the " Scotia " during a time t before the ascent. In the case of the 

 ascent of July 25th the necessary observations were unobtainable because the " Scotia " 

 was in port till July 24th. lu this case the wind force recorded by the steamers, from 

 whose observations was traced the path along which the air approached the position 

 of the " Scotia " at the time of the kite ascent of July 25th, varied from 2 to 3 on 

 the Beaufort Scale. 



It will be seen that for .the ascents of May 3rd, August 2nd, and August 4th, 

 when the wind force was about 3, the values of ^ (wd) are 3'4 x 10 3 , 2'5 x 10 3 , 2'6 x 10 3 



