THE ATMOSPHERE 53 



as possible from the mouth into the bottle. Withdraw the 

 mouth quickly to one side. Explain the fountain effect. 



5. Where about us is air to be found? Attempt to 

 grasp a handful of it. Account for the inability to do this. 

 Point to any air that you see. 



6. Look at a pencil through window glass. What 

 property of the glass is manifest? Remove the glass, and 

 look at the pencil through air. What property of air is 

 manifest ? 



7. What odor has pure air? What taste? 



8. What is a chief constituent of air other than 

 oxygen ? 



9. Name several uses served by air (a) when still ; 

 (b) when in motion as a wind. 



10. Write in a column a list of a dozen things you have 

 known the wind to do. Then in a column, and opposite 

 every such act, write adjectives characterizing it, using 

 such words as saucy, tireless, gentle, angry, etc. Mention 

 the various names given to winds by reason of variation in 

 their force (intensity). 



11. What are the names given to winds according to 

 the directions whence they blow? Name several ways 

 in which wind directions may be somewhat accurately 

 noted. 



12. Tell of the importance ^of winds to mankind in com- 

 merce. In what ways do winds minister to man's comfort 

 and to his discomfort ? In what ways do winds affect man's 

 health? 



