40 



BULLETIN 906, U. S. DEPARTMENT OF AGRICULTURE. 



Fig. 16. — Miner's inch box with waste way. 



the rod of a float. The float and its record may measure the height 

 of water over a weir or in a rating channel. 



Mechanical recording devices. 



These as a rule operate by a vane or propeller revolved by the 

 action of the water as it passes through the meter. They possess an 

 advantage in registering a flow whose record can be readily observed. 



!; - 



17. — An Azusa miner's inch 



