Now we know there are 525, 600 minutes 18500000 . . a- : .. ... , in a year, .ac. -y^r gOCT ... described under Levelling. When this is done the engineer can see what is the best gradient at which his sewer is to run, and the best MAIN DRAINAGE.
|Title||:||A manual of civil engineering practice|
|Author||:||F. Noel Taylor|