134 



FIRST YEAR SCIENCE 



bearable, but at night it is so cold that heavy blankets are 

 needed to keep the traveler warm. 



The nearness to the sea and the direction of the wind 

 also greatly affect the temperature of a place. In some 

 parts of the earth these are the principal causes in de- 

 termining the temperature. Thus the temperature of the 



A WINTER SCENE IN MONTREAL. 

 The famous Ice Palace, built entirely of blocks of ice. 



atmosphere at any place is not due to a single cause, but 

 is the result of many and complex causes, such as latitude, 

 height, direction of prevailing winds, ocean currents, near- 

 ness to the sea, and kind of soil. 



Maps are sometimes constructed showing heat belts 

 where tropical, temperate and frigid conditions are found. 

 These belts do not correspond very closely to the torrid, 

 temperate and frigid latitude zones. 



66. Graphic Method of Showing the Temperature of a 

 Region. It is often quite essential that the temperature 



