72 W. & L. E. GURLEY, TROY, NEW YORK 



The staff gage, whether vertical or im -lined, is the most 

 satisfactory* non-recording gage for all ordinary conditions. 

 In many cases it is possible to read staff gages more accurately 

 if a stilling box is used. A small box without a cover, and with 



FHJ. 38 Vertical and Inclined Staff (Jages. 



one end removed, just wide enough to slide along the bedpiece, 

 makes an excellent, simple device for this purpose. The box 

 turned upside down, is placed on the gage each time it is read, 

 being stored above high water when not in use. 



In some situations, two gages (Fig. 38) are desirable, one 

 for low and the other for high water. 



Hook gages are used in stream gaging work in the wells 

 where automatic registers are installed, or elsewhere for special 

 investigations. 



