PRINCIPLES CONTROLLING ORE DEPOSITS 7 AS 



at other points. The water entering at innumerable points in 

 vertical section and in horizontal section mutually interfere, and 

 make the course for any given particle of water rather simple. 



^orOS 



Fig. 4. 



This I have tried to represent by another chart (Fig. 5). In 

 this chart I have supposed particles of water to enter at equal 

 horizontal intervals, and issue at a single point. You note that 

 the water near the crest begins its journey by almost vertical 



