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



SUGGESTIONS FOR THE SELECTION OF AUTOMATIC 

 WATER STAGE REGISTERS 



There are two classes of automatic water stage registers. 

 <>n<- class makes a continuous printed record of stage and tim< : 

 the other class makes a graphic record of stage and time. 



In selecting an automatic water stage register careful atten- 

 linn should be given to the conditions under which it is required 

 to work, and to the type of record required. 



PRINTING REGISTERS 



The printing register is especially well adapted 



(1) To situations that require a record in type. 



(2) To inaccessible locations. 



(3) As a convenience in operation at other stati<m>. 



(4) Where only non-technical assistance is available 



to compute the records. 



Printed records of stage and time have a single dcfmil* 

 meaning and hence are not affected by personal equation when 

 used by different individuals. For this reason printed records 

 are particularly well adapted to those situations in which a 

 legal interpretation of the record is to be made. They are also 

 well adapted to the use of water commissioners, operators, and 

 owners without technical training in the use of graphic records. 



When the record is to be made at a location which is not 

 easily accessible and hence at which it is necessary to have a 

 reliable and readily interpreted long time record, unaffected 

 by weather conditions, the printing register meets fully all of 

 the requirements. Gurley Printing Registers have operated 

 continuously in many situations of this kind for six month- 

 without attention. 



At many locations the record sheets must be changed by 

 assistants who are not able to follow a regular schedule. At 

 such places continuity of the record of the printing register is 

 unaffected by such irregularity. 



Printing records are easily compiled. It is often convenient 

 to have such work done by power house operators or oil XT- 

 not familiar with graphic processes. Printed records lend 

 themselves readily to such uses. 



