1904] Nature Study — No. 18. 147 



soft, pure and impure water ; tests and methods of impure water ; 

 tests and methods of purification ot water. 



Sources of heat : Expeiiments to show the effects of heat in 

 the expansion of solids, liquids, and gases ; practical applications. 

 Temperature; thermometer, construction and graduation Methods 

 of ttansmission of heat, conduction, convection, and radiation ; 

 causes of winds and ocean currents ; ventilation. 



Form IV. 



Nature Study. — Course of Form III. continued Anim il life ; 

 relation of fish, birds, and wild animals to man ; life histories of 

 conspicuous and economic insects ; organs and functions. 



Plant life ; study of organs of plants and their functions ; 

 study of economic and wild plants from .seed to fruit in the school 

 garden, home garden, farm and forest; weeds injurious to crops 

 and methods of destroying them ; buds and twigs : wood, rings, , 

 grain, and bark, uses, etc. 



Observing local minerals and rocks, their properties and uses ; 

 experiments to show composition of soils and their relation to 

 drainage, temperature, etc.; varieties of soils adapted to different 

 crops ; fertilizers, etc. Implements and tools used on the farm 

 and in the household, mechanical principles applied in their con- 

 struction. 



The atmosphere ; its composition ; combustion, simple ex- 

 periments, study of candle flame products ; changes produced in the 

 air by respiration ; reciprocal relation of plants and animals as 

 regards the atmosphere ; impurities in air. 



Gravity ; air and liquid pressure, the barometer. Cohesion 

 and adhesion, the nature jf these forces ; phenomenon of solution 

 and diffusion ; amorphous and crystalline forms of matter. Prac- 

 tical use ot heat, steam, and electricity, in connection with the 

 study of industries. 



Fortn V. 



Elementary Science. — An elementary course in Botany, 

 Zoology, and Physics. 



For the details of the course, see Appendix B., p. 82 of printed 

 Regulations of the Education Department of the Province of 

 Ontario. 



