DRAINING. 



183 



heavier will be the expense incurred, although in some instances the 

 quality of the soil may alter this as, for instance, on referring to the 



FIG. 66. 



No. 1. 



No. 2. 



No. 3. 



No. 6. 



No. 4. 



No. 5. 



No. 7. No. 8. No. 9. No. 10. 



table, it will be found that, in a friable clay, drains made two feet nine 



