30 



FIRST YEAR SCIENCE 



west and add a day if going toward the east. The con- 

 ventional place where this is done is at the International 

 Date Line, a line extending through the Pacific Ocean 

 and in general corresponding with the 180th meridian. 



MAP SHOWING INTERNATIONAL DATE LINE (Dotted Line). 



14. Standard Time. When railways extending east and 

 west became numerous in the United States and there 

 were many through trains and numerous passengers, it 

 became very inconvenient to use local time, since no two 

 places had the same time. Each railway therefore adopted 

 a time of its own, and when several railways entered the 

 same city these different times became very confusing. 

 Therefore in 1883 the American Railway Association per- 

 suaded the Government to adopt Standard Time. 



