Preparation of the Land 



31 



block with a broad base, one may obtain the levels at impor- 

 tant points on the ground, and then by stretching strings 

 from stake to stake, as shown in Figs. 9 and 10, easily judge 

 of the comparative height of each point, and make up the 





Fig. 9. — Illustrating Methods of Obtaining Grade. 



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 Fig. 10. — Illustrating Methods of Obtaining Grade. 



grade-lines and mark on the stake the necessary depth of 

 fill or excavation to be made at each stake. In all this work 

 the different grade-lines must be made to blend together 

 so as to form a pleasing whole. 



Where the land is rough and more or less covered with 



