CHAPTER II. DISCUSSION OF GENERAL EQUATIONS. 431 

7. The two component waves and their reflected waves. 

Attenuation in time and in space. 431 

8. Period, wave length, time and distance attenuation 

constants. 433 

9. Simplification of equations at high frequency, and the 

velocity unit of distance. 434 

10. Decrement of traveling wave. 436 

11. Physical meaning of the two component waves. 437 

12. Stationary or standing wave. Trigonometric arid logarith- 

mic waves. 438 

13. Propagation constant of wave. 440