CH. XIX 



TIME-TABLE 



445 



By constructing a diagram of this kind, it will be 

 easy to see exactly how the time should be arranged, 

 and at what moments the coach should pass any 

 other points : x, y, z. 



The diagram should be made upon the engraved, 

 divided paper which can be bought of any dealer in 

 engineering supplies. 



After the road has been laid out in this way, a 

 Time-table is prepared, as follows : — 



The ' Hour of Coach' is the time of arriving at 

 each station. The time in minutes of each staee is 

 from arrival to arrival, except in the first line, where 

 it is from the time of starting from the initial point. 



In the old English mail-coach days the guard was 

 provided with a Time-bill something in this form, 

 except that it had a column in which the actual times 

 of arrival had to be entered by the guard so as to 

 show how the time had been kept. For this pur- 



