38 Numerical JnflruElions 



See the Operation. 



F. In, 



127 ; 6 long: 

 88 • 2 wide. 



127 Foot by 8 Foot • 1016 



127 Foot by 80 Foot — • 1017 

 88 Foot by 6 Inches — 44 

 127 Foot by 3 Inches — 3 1 



11261 . 10 



^ The Sum of 11 261 Feet behig the fuperfj- 

 cial Content of this defign d regular Hollow, 

 {the Inches being rejeaed,as of little Account) 

 we are in the next Place to divide the Con- 

 tent of the irregular Hollow thereby, and 

 that will give the exad Depth. 



As for Example: 

 ,ii26i)9574s(8i^TVyT,whichisabovefanInch. 

 5659 : . 



sn^. 



■ 'And by this we fee, that this Pit we regu- 

 larly reduc'd, is to be 8 Foot and a half deep: 

 If it were to be a Hill that was to be reduced 

 into the fame Method and Figure, the fame 

 Calculation would fuffice. 



