NATURE-STUDY LESSONS. 7 



D. How to Train the Sense of Sight. 



13. The teacher or someone else will : — 



(a) Hold for an instant a number of articles before 

 the class. The pupil will tell how many 

 there are and their names in order. 



(3) For a moment expose a combination of letters 

 not making a word upon the blackboard and 

 have the number of letters in it given. 



(c) Put a column of letters upon the board covered 

 with a card or screen, withdraw the covering 

 for a definite time, as a second or two, and 

 have their number told. 



14. Observe and name objects on the way to and from 

 school. 



15. Observe the shape of different houses and sketch 

 one from memory. Compare your sketch with one 

 made while looking at the house. 



16. While the memory is still fresh, write lists of 

 things observed under the following headings : — 



(a) Flowers. 

 (i5) Trees. 

 (c) Animals. 



17. Discover from these experiments the effect of 

 attention upon seeing. 



IV.-HEARING. 

 A. How Sound Travels. 



1. Have someone strike the end of the table while 

 you listen at the other end. Note the effect. 



2. With a pin or nail scratch the end cf a ruler or 

 long pointer while the other end is held against your 

 ear. Note the effect. 



