MANUAL OF NATURB STUDY. 157 



Leam tlie points or marks by which any mem- 

 ber of the Lily family is known. Examine the 

 tulip, the trillium and dog-toothed violet. What 

 are the points in common? Let pupils collect 

 others of the same family. Is the calla a lily? 

 The Indian turnip ? Examine them in comparison 

 with each other and in contrast with the lily. 



If these families are well worked out the pupils 

 will be fairly well equipped for the future study 

 of flowers. 



B. — Physiology. 



1. Study somewhat in detail, foods, hunger, 

 thirst, cooking, fatigue, etc. 



2. Study the special senses, seeing, hearing, 

 etc. See third grade work for discussion of these 

 two topics. 



Note. — Use charts to give correct ideas of the 

 organs of the special senses. Make strong the 

 hygienic teaching in connection with the vari- 

 ous senses and topics considered. 



