208 THE EARTH MADE READY FOR MAN 



and clay and stones, and from tiny shells in the depth 

 of the sea. 



If it should be possible for the teacher to see specimens 

 of foraminifera or rhizopods through a microscope she could 

 impress upon the children in a very vivid way the minute- 

 ness and beauty of those (probably) first forms of animal 

 life with which our world was peopled. 



The children should be encouraged to look for the 

 different kinds of rock mentioned in this lesson. If they 

 have no chance to visit the open country, let them see 

 the rock of which different buildings are made. They 

 should be told what kind or kinds of rock are the common 

 or ''country" rock of the vicinity. 



Hand Work 



The answers to questions on the leaflet may be made 

 at home, or time may be given for that work at the next 

 lesson period. 



OPENING TALK 



Did you know that there are different sorts of rock in 

 the world? We have talked of one kind that is much 

 used in building. What is its name? Yes, granite. 

 You can tell me, too, what it is made of — that is right, 

 crystals that did not have room to take their usual forms. 



Now not all of the rocks are granite. Wouldn't you 

 like to know the other kinds, so that when you see 

 rocks you could tell one from another as you can plants 

 or animals? You would like to know, too, how they are 

 made; and you will find that the busy worker you have 

 heard so much about is the one who had much to do in 

 making the rocks, — water. This time it is not alone the 

 falling raindrops, or the snow and ice, or the brooks and 

 rivers; it is the great ocean itself and the forms of life in 

 it that does part of the work, as you shall hear. 



