*THE ARTS AND INDUSTRIES. 



69. Weather Observations. 



The observation of the weather is valuable for many, 

 reasons. If we make observations regularly we get into 

 the habit of keeping records of the observations in order 

 to compare them with later ones. We soon learn that 

 our memory is often weak and that records are to be 

 trusted every time. The value of the records grows as 

 they increase. Thus a record of the daily temperature 

 for two years is much more valuable than for one year, 

 while a record for ten years is of great value, especially 

 in a farming district. Why? In the same way the rec- 

 old of the rainfall for several years helps the farmers, for 

 they would not plant crops which require a very large 

 amount of waiter in a locality where the rainfall is always 

 small. 



The records which you are beginning to keep will 

 become a source of great pleasure to you as you grad- 

 ually add more observations, and the record for each 

 kind of observation increases with time. Begin by 

 * Note to the Teacher: The scientific facts, upon which 

 the following practical applications are based, have been stud- 

 ied in the preceding divisions. The great purpose of this 

 division is to show that science is a matter of everyday interest 

 and is of immense value to everyone alike. Since the prin- 

 ciples have been stated in other sections these sections are 

 necessarily shorter than those others. 



