33 



FOURTH GRADE. 



SEPTEMBEK. 



PLANTS. 



Each pupil select tree for systematic study ttrougliout 

 the year. Protective coloration of leaves and fruit; devel- 

 opment of flowers into fruit; form of fruit — ^fleshy, stone, 

 dry. 



Lower forms of plant life — algae, fungi, and lichens. 



ANIMALS. 



Swamp life. Observe larval stage of insects. Compare 

 clam and oyster, as to food, habits, structure, movements, 

 protection, nature of shell. 



MINERALS. 



Character of soil formed in swamps and marshes. Belate 

 to peat bogs. 



ELEMENTARY GEOGRAPHY. 



Magnetic needle; compass; construction and use. Re- 

 late to iron and steel. 



Dissolve salt, alum, lime in water. Relate solution to 

 erosion of rock, and lime in solution to shells and bones 

 of animals. 



Daily record of day, date, frost or dew, clouds or fogs, 

 rainfall, temperature, barometer, sunrise, sunset, morning 

 star, evening star, moon's phases, moonrise, moonset. 



Measure slant of sun's rays on shadow stick. Autumnal 

 Equinox, September twenty-first; path of sun. Mars, Mer- 

 cury. 



