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



THE LONG DISTANCE REGISTER 



The No. 637 Register consists of a Gurley No. 633 

 Register equipped with magnets to operate the drum. Tin- 

 Register which is the result of years of experience in manu- 

 facturing water stage registers is equipped with a high grade 

 chronnmrtrr, strengthened with specially designed bearings. 

 This clock revolves two screws which carry a pencil carriage 

 along the top of a horizontal drum on which the record is made; 

 it is adjusted in the ordinary manner to record standard time. 

 Attention is called to the fact that, in using curves for calm la I inn 



:.T. N" ;:., I . >ng Distauce iJniplm- Water Stage 



of quantity of water discharged, the time scale is just as impor- 

 tant as the elevation scale; consequently the Gurley clock 

 mechanism is designed and manufactured with great care. 



Instead of being directly connected to the float, as in the No. 

 633 Register, the drum of the No. 637 Long Distance Register 

 is revolved by two sets of magnets operating a ratchet wheel, 

 in one direction when the water is rising, and in the reverse 

 direction, when falling. These magnets are energized when- 

 ever the circut is closed by the operation of the No. 638 Sender. 

 The operating arms which are attached to the magnet armatures 



