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 



IB 



FIG. 9. Illustrating Methods of Obtaining Grade. 



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 



