38 



Vernal Equinox. Angle of sun's rays with horizon; re- 

 late to latitude. Relation of latitude to climate. 



NOTE. — Relate lime, shell life and coral in ocean to beds of 

 limestone. Encourage pupils to make collections of land and sea 

 shells; note beauty of texture, color, form, markings, spines, etc. 



APEIL. 



PLANTS. 



Continue tree study. Examine lichens, fungi, for spores. 

 Note color, texture, form, growth of lower forms of plants. 



ANIMALS. 



Study dragon fly. Compare life histoi-y with that of a 

 moth. 



MINERALS. 



Effect of rain upon soil. Transporting power of a stream 

 of rapid and slow velocity. Effect of stream carrying sed- 

 iment and one which does not. Eelation of hardness of min- 

 erals to erosion. 



ELEMENTARY GEOGRAPHY. 



What isotherm passes through Detroit. Compare this 

 with October. Compare temperature and rainfall with Oc- 

 tober. 



Compare force of sunbeam in Detroit with December. 



NOTE.— Pupils should observe forces acting about them, and 

 should be led to see the great sculpturing of the face of Nature 

 is produced by same forces acting on a greater scale. Relato 

 hardness of rock to resistcance to erosion. 



MAY. 



PLANTS. 



Compare flowering and floMerless plants; flo^^•ers and 

 spore cases. 



