236 PIERCE. 



power. If we replace the k of (81) by its value in terms of A, the two 

 expressions may be added together. At the time of the addition 

 WT shall reduce the units to the practical system by multiplying the 

 right hand sides of both power equations by 30 times the velocity of 

 light in centimeters per second (i. e. by 30 c), and obtain 



p = 60 P 



.42 'j .05 B^ - .00985 B^ + .000849 B^ - 



.0000356 fii"--- ' 



+ A^ I .0083 B^ - .00480 5^ + .000729 B" - 



.0000486 B' -\-.. I 

 - A' \ .01148 B^ - .00227 5« + .000198 B^ - 



.00000953 510 + ... I 

 00127 53 - .000741 B'^ + .000106 B^ - 



.0000073 B' + ... - 



_ 45 ) 

 I 



+ A' ■ .00111 B^ - .00014 5*5 + .000019 B' - i 



+ 



(106) 



This is the total power contribution of the flat top by virtue of its indi- 

 vidual and mutual action. The power is in watts, and the current I is 

 in amperes. 



Certain Tables computed in the next Part of this communication 

 make calculations with this series comparatively simple. 



