CHAPTER XV 



READING, BOOK PRINT, AND GLASSES 



If a carpenter is hammering nails into the wall, or if a 

 shoemaker is sewing leather to make a shoe, it does 



not matter very much how 

 the light falls, because his 

 work is so big that he can 

 see it well enough in any 

 part of the room; but if a 

 man is writing a lecture, or 

 if a boy is studying his les- 

 sons, it makes very much 

 difference where the light 

 comes from. People who 

 use books and pens every 

 day have to be specially 

 careful about the way the 

 light shines on their work. 

 Look around your school- 

 room and see where the 



BOOK IN THE SHADOW t i , i i , -r^ 



light is brightest. Every 



house gets its light either from daylight through the win- 

 dows which is the very best to use or from lamps, 



70 



