A GRADED COURSE OF NATURE-STUDY 485 



ing. Make considerable of the application of principles to 

 life situations or industries, etc., and if possible observe these 

 applications. Allow the children to exercise their construc- 

 tive and inventive talents. 



The elementary agriculture becomes more and more 

 specialized, and could be well taught in a separate department 

 as applied science, just as we do with domestic economy and 

 manual training. 



The work in the seventh grade presents, perhaps, a greater 

 variety of topics than the eighth, and the logical sequence 

 of the sciences is not pressed quite so far. The reasoning 

 demanded is also not quite so severe. Otherwise this discus- 

 sion applies with equal force to both grades. 



Suggestions for correlated art lessons — see p. 57. The asterisk indicates 

 subjects for diagrams, drawings, paintings, etc. The numbers refer to gen- 

 eral reference list, p. 521. 



Throughout the Year 



Earth Study : Economic geology : Building stones, clay, 

 ores, metals (iron), mining methods; the Age of Steel; peat, 

 coal (different kinds) ; salt, borax, sulphur. Discuss the chief 

 localities where each is found, mode of occurrence, manner 

 of getting it, treatment in purification, commerce, importance 

 in the arts. Something may be done with the origin. (Physical 

 geographies, and geologies, 326, 339, 330, 337, 343, 348, 475a. 

 Geographies and commercial geographies also 320. Tarr's 

 "Economic Geology." Industry: 316, 317,323, 321. Inven- 

 tions: 321, 287, 288, 292.) 



Physics : Water power and its applications.* The steam 

 engine,* its principle and uses. Examine an engine at work, 

 also the boiler.* Have engineer describe the running of 



