664 



R['RAL School Leaflet. 



winds that are sure to blow these fall days. Let us keep a record of the 

 direction of the winds for the month of October. \\'hen finding out the 

 direction of the wind, ask your teacher if you may all go out and let it 

 blow in your faces. Notice what the wind does to the trees. In what way 

 do you think it may be responsible for the shape of trees in your vicinity ? 

 Why do farmers plant a row of trees for a wind-break? 



As soon as you begin to think about the wind you will probably want 

 to know how it blows. Here is a lesson prepared for 3'ou by Dr. \\'ilson 

 of the United States Weather Bureau. Can you learn from it how the 

 wind blows? Read the lesson very carefully. Then, if your teacher will 

 work with you, go out into your school grounds and prepare a bonfire 

 as Dr. Wilson suggests. I want you to see whether you can find out 

 what happens when the wind blows. 



HOW TO MAKE THE WIND BLOW. Fig. 9. 

 By Wilford \L Wilson. 

 When school begins in autumn, one of the first things to do is to clean 





-~.^ r"^ Curran 



Fig. 9. — How the wind blows. 

 up the school-grounds. It may be that the weeds and grass have grown 

 tall in the long summer vacation and you will need the help of a man with 

 a mowJJig machine or a scythe, (lather into one big heap all the dead 

 leaves, brush, grass and rubbish and when it is thoroughly dry it wm'11 make 



