December 3, 1920] 



(SCIENCE 



h'n 



TABLE II 



Geometric, Kinematic and Mechanical 



units in engineering and scientific work would 

 be identical. 



The advantages to be gained are indicated 

 by the following statement of some of the 

 points of difference from both, the English and 

 the metric system. In the proposed system: 



The fundamental unit of capacity (liquid 

 measure) is the cube of the unit of length. 



Astronomic units of distance now in use, 

 " light second," " light hour," etc., are com- 

 mensurable with the units proposed, the first 

 being one hillion times the fundamental unit 

 of length. 



Under " standard conditions " one mol of 

 " perfect gas " occupies unit voltime. 



The difference between the specific heats of 

 a " perfect gas " at constant pressure and at 

 constant volume is 1. 



Unit current in electrolysis deposits per sec- 

 ond one hillionth of an equivalent of metal. 



The electrostatic capacity of an air con- 



denser and the permeance of a magnetic air 

 gap (or a magnetic circuit in air) are each 

 one hillionth of their respective " shape fac- 

 tors."* 



The electric flux from a charge is equal to 

 the charge, and the magnetic flux from a mag- 

 netic pole is equal to the pole strength. 



The magnetomotive force, per turn, of a 

 coil is equal to the current flowing through it. 



The electromotive force, per turn, generated 

 in a eoil is equal to the rate of change of the 

 flux within it. 



The energy of an electric, or magnetic, field 

 is equal to one half the product of the flux and, 

 respectively, the electromotive or magneto- 

 motive force. 



i ' ' Flow of Heat through Furnace Walls ; the 

 Shape Factor," Irving Langmuir, E. Q. Adams 

 and G. S. Meikle, Trans. Amer. Electroehem. Soc, 

 24, 53 (1914). 



