138 



Our Surroundings 



Land and Sea Breezes. Land and sea breezes are due to 

 the fact that the land warms faster than the water in the day- 

 time and cools faster than the water at night. As the air above 

 the land warms in the daytime, it becomes lighter and rises, and 

 cooler air from the water area flows in to take its place, thus 

 causing- a sea breeze. Again, as the air above the land in the 

 evening becomes cooler, it flows over the water to take the place 

 of warmer air that is rising, thus causing a land breeze. 



Underwood & Underwood. 



IN THE WAKE OF A TORNADO 



Weather Instruments. In addition to the thermometer, the 

 barometer, and the rain gauge, there are other instruments used 

 in the study of the weather. Among these are the aneroid barom- 

 eter, the barograph, and the anemometer. 



An aneroid barometer is a non-liquid barometer and resembles 

 an ordinary alarm clock in form. Like all barometers, it indicates 

 the pressure of the atmosphere and is therefore useful in fore- 

 telling the weather. It has a dial upon its face with two pointers. 



