700 DEFINITION OF ELECTRICAL UNITS 



Seventh. The unit of power shall be the Watt, which is equal to 

 ten million units of power in the centimeter-gram-second system, 

 and which is practically equivalent to the work done at the rate 

 of ono Joule per second. 



Eighth. The unit of induction shall be the Henry, which is the 

 __ induction in a circuit when the electro-motive force induced in 



this circuit is one international volt while the inducing current 

 varies at the rate of one ampere per second. 



SECTION 2. That it shall be the duty of the National Academy of 

 Sciences to prescribe and publish, as soon as possible after the passage 

 of this act, such specifications of detail as shall be necessary for the 

 practical application of the definitions of the ampere and volt herein- 

 before given, and such specifications shall be the standard specifications 

 herein mentioned. 



The Act of July 12, 1894, is still in force, but advantage has been taken 

 of the manner of stating how the international volt shall be practically 

 realized and the correct value of the e.m.f. of the Weston normal cell 

 has been substituted by the Bureau of Standards for the erroneous value 

 of the e.m.f. of the Clark cell stated in the act. 



OF ELECTRICAL LABORATORY, 



FACULTY OF APPLIED SCIENCE. 



Date. 



