158 LABORATORY LESSONS IN GENERAL SCIENCE 



(a) of substances used in houses for fuel and lights ; (6) of 

 foods eaten uncooked; (c) of food material prepared for 

 table use by cooking in the home kitchen; (d) of canned 

 goods ; (e) of drinks other than water ; (/) of raw materials 

 for clothing; (g) of articles of furniture; (h) of materials 

 having large use in building houses. 



In these lists underscore the names of all those substances 

 derived directly or indirectly from plants. (Be ready to 



FIG. 71. Our next year's clothing. 



state in class just how this is in all cases where the origin is 

 not clearly apparent.) 



2. Tell briefly but very definitely the dependence of people 

 upon plants, and upon the products manufactured from 

 them, in matters (a) of travel ; (6) of medicines ; (c) of live- 

 lihood ; (d) of comforts of life ; (e) of pleasant surroundings. 



