108 W. & L. E. GURLEY. TROY. NEW YORK 



indies per day. If this register is set high enough above the 

 water, the pencil can be made to travel across the paper in two 

 weeks, or at the rate of V* inch per day. 



INSTALLATION AND OPERATION OF GURLEY GRAPHIC REGISTERS 

 Nos. 633 AND 636 



A large element in the satisfactory operation of an auto- 

 matic register is proper installation. The results from the best 

 register will be impaired by improper installation, whereas a 

 register properly installed will give a record the accuracy of 

 which depends solely on the adequacy of the instrument. The 

 value of approximate results is not commensurate with the 

 expense of an automatic register; therefore, the method of 

 installation should be so thorough as to insure accuracy. 



In installing an automatic register, it is necessary to provide 

 a well for the float, connected with the water to be measured 

 by an intake pipe. If necessary, a valve should be used in I In- 

 well on the intake pipe, so that the water can be throttled to 

 prevent any surge appearing on the record sheet. 



To place the register permanently. The register is usually 

 placed on a table having holes cut for the phosphor bronze band. 

 Place the register in its proper position and fasten it to the 

 table by the quarter-inch bolts that are furnished. Attach the 

 metal band to the float; lower the float to the surface of the 

 water; bring the metal band up through the table and over 

 the sprocket wheel; then down through the table and attach 

 the counterweight. 



To place the pencil carriage on the screws. The pencil 

 carriage is engraved, "Toward clock". It is important to place 

 the carriage on the screws in the correct position. To do this, 

 tip the carriage so that one side will fit on the screw, then swing 

 down as on a hinge until it rests on the other screw. 



To set the pencil to the exact height. Insert the record 

 sheet in the Y* inch deep slot which extends through the entire 

 length of the recording cylinder. This will hold the paper 

 securely and always bring the sheets in the same position on 

 the cylinder. Loosen nut (15). The pencil point being the 

 index, hold the sprocket wheel so it cannot move. Turning the 



