MANTJAI. OF NATDRB STUDY. 3? 



the stigma. The little grains in the ovary are 

 called ovules. The teacher should now review all 

 the whorls, and parts of each whorl. 



Next ask certain pupils of the class to bring 

 to the school-room on another day some member 

 of the Mustard family, or some other simple 

 flower, so that the children can compare the parts 

 of the new flower with those of the Spring Beauty 

 in every particular. At another time, a different 

 flower, and so on, until a half-dozen flowers have 

 been analyzed and names learned. 



Up to this time, nothing has been said about the 

 function of the parts of the flower. We may now 

 begin this subject by introducing factories in gen- 

 eral. A factory is a building in which goods are 

 manufactured, as a mill, where flour and meal are 

 made. Let the children give other examples, nam- 

 ing in each case the raw material out of which 

 must come the manufactured product. The flower 

 of the Spring Beauty is a factory. It manufactures 

 Spring Beauty seeds. The raw material is pollen 

 and ovules. These two kinds of stuff must be 

 mixed together at just the right time or the goods 

 will be spoiled. The ovary is the hopper, the style 

 is the tube through which the pollen must grow 

 downward to the hopper, where the ovules are. 

 The stigma must be moist when the pollen is let 



