44 FIRST YEAR SCIENCE 



degree north of the equator and traveled a degree south and then 

 a degree east. How far would he travel? In both cases he traveled 

 a degree of latitude and a degree of longitude. Do the distances 

 differ? If so, why? 



If it is 12 o'clock local time at your home, what time is it at Paris ? 

 At Honolulu ? 



What practical advantages and applications of magnetism do you 

 know? 



Why is it necessary for a mariner to know the declination ? 



