95 



II. Work of Glacier. 



1. Erosion. 



(a) Grinding of rocks carried and passed over, freeing boulder 



clay. 



(b) Polishing and striating rocks. 



(c) Wearing of surface contour by moving ice. 



2. Transportation. 



(a.) On top of ice. 



(b) Embedded in ice. 



(c) Under ice. 



3. Deposition. 



(a) Unassorted and unstratified mass of clay and boulders. 



(b) Assorted and stratified sand and gravel left by glacial streams. 



(c) Irregular deposition forming lakes. 



In connection with glaciers review evaporation, condensation and 

 snow crystals. 



Do you see any evidences of glaciers in your neighborhood ground 

 rock, scratched boulders, granitic boulders; moraines? 



Compare glaciated areas of North America with non-glaciated. 



Locate lake regions of North America. What effect did glaciers 

 have on drainage systems, agricultural products of glaciated regions? 

 What element in soil do grains require? What kind of rock sup- 

 plies it? 



Whether the world was made for man or not it was well made for 

 that purpose. This work in geographical nature study is outlined for 

 the purpose of having children see the relation between present and 

 past geographical conditions; that present agricultural, commercial, 

 and industrial progress is dependent upon the mineral deposits, drain- 

 age systems, soil and climatic conditions; that nothing is isolated 

 all nature is a unit. 



As a rule very little attention is given to the lower forms of plant- 

 life. They are so abundant and so beautiful they should be studied. 

 The algae can be observed in the aquarium. If possible the threads 

 should be examined with a compound microscope. Puff balls, toad 

 stools, and mushrooms are of great interest and should be studied; 

 some on account of their beatuy of coloring, mushrooms because of 

 their value for food. Remove the stem-like structure of a mushroom ; 

 put the cap on a piece of white paper, cover with a glass. After a 

 few hours remove the glass and cap and notice the spore print. 

 Lichens can be found on trees, rocks, old fences and on the ground all 

 through the year. Note color, variety, form, fruiting cups. Relate 

 to disintegration of rock and soil formation. 



Different varieties of mosses and liverworts should be observed; 

 structure is too difficult to attempt. 



Ferns should be carefully studied they are so abundant and so 

 closely related to the coal period. 



7 



