APPLICATION OF THE ELECTRIC TELEGRAPH. 325 



MODE OF REGISTERING THE OBSERVATIONS. 



The most obvious mode of registering the beats of the 

 clock is upon a long fillet of paper, after the ordinary 

 method of telegraphic communications. If the paper be 

 allowed to run through an ordinary Morse registering ap- 

 paratus, and the circuit be broken every second by the 

 clock, the graver will trace upon the "paper a series of 

 lines of equal length separated by short interruptions 

 thus: 



It is easy to reverse the action of the graver, so that 

 when the circuit is complete, the paper shaU be entirely 

 free, and a dot be made by the breaking of the circuit. A 

 paper graduated into seconds by this arrangement ex- 

 hibits dots with long intervening spaces thus : 



instead of long lines with short blanks, as shown be- 

 fore. 



In order to indicate the commencement of the minute, 

 a dot may be omitted at the end of every 60 seconds. 

 This is accomplished in Dr. Locke's clock by omitting 

 one tooth in the wheel which breaks the circuit, as shown 

 at H in the figure page 322. 



The mode of using the register for marking the date of 

 any event, is to tap on a break-circuit key, simulta- 



