Ratio of the Length and Height of Sea Waves. 115 



points, a certain curve (A C) will be traced out. When this 

 curve is precisely the same as another it is certain that the 

 same form of wave as to height and length will be produced ; 

 and, for the same reason, when the curves differ the forms 

 of the waves produced wiU differ. 



Or, instead, let the abscissa A B be a time scale. The 

 curve resulting from the time scale wiU have a definite 

 relation to that from the distance scale; and it seems 

 pretty certain, as like causes must produce like effects, that 

 the form of the wave produced^ as it exists at the point B, 

 will be determined by the nature of these curves, and stand 

 in some definite relation to the area A B C — a relation 

 which, however difficult to determine, shows the infinite 

 variety which the form of the wave (in which the height 

 and length are only particular ordinates) may assume. 



Abt. XYII. — Notes on the Neivly-found Satellites of Mars. 

 By R. L. J. Ellery, F.RS., F.R.A.S. 



[Read December 13th, 1877.] 



Art. XVIII. — On the Telephone. 

 By W. C. Kernot, M.A., C.E. 



[Read December 13th, 1877.] 



