296 WAVES OF THE SEA 



Observations on a Conduit from Territet to Glion 



From Territet (on the Lake of Geneva) to Glion, 

 about 800 feet above, there runs a funicular rail- 

 way, with an average ascent of nearly i in 2. On 

 the east of the line is a cement conduit, 14 inches 

 wide, with flat bottom and nearly vertical aides, 

 which carries off small quantities of water over- 

 flowing from the machinery, as well as, perhaps, 

 a little drainage water. The regularity of the con- 

 duit is interrupted above the bridge which crosses 

 it on a level with the Church of Les Planches, 

 and the water there flows in the ordinary manner. 

 It is only from the place where the cement floor 

 commences that the waves become noticeable. The 

 slight, rapid, and confused inequalities of the 

 flickering flow here become regularised into trans- 

 verse progressive waves in the course of a few 

 yards, and these waves dash past the bridge and 

 go foaming on as far as the railway station <in 

 an orderly and regular procession, dozens of frothy 

 crests being simultaneously visible. 



On February 9, 1905, I measured the depth at the 

 crests of the waves and found it to be 0.2 inches, 

 and at the troughs o . i inch . The apparent period 

 (that is to say, the interval of time separating; the 

 passage of two succeeding crests past the observer 



