I2Q The PraBke Part 11 



"Wind, fliould throw it down, it not being fufEcient barely 

 to drive it into the Ground; as you do the Stakes. Then 

 take the Height of one of the Stakes that bear the 

 Ruler upon which the Level was fet, including alfo the 

 Breadth of the faid Ruler, ^Jl which is here fuppofed to be 

 four Foot ; and mcafure four Foot downwards upon the 

 Pole 5, adding what is neceffary for the Declivity, or Fall, 

 in 30 Fathom, which here may be 15 Inches, making in all 

 five Foot three Inches, which being marked upon the Pole 

 with a Piece of Charcoal, determines the Level and Fall of 

 theTerrafs. This done, meafure the Height the Terrafs 

 ought to have, according to the Profil, Fig. 2. which is 

 quoted 15 Foot, and fet 15 Foot downwards again from the 

 Charcoal Mark before made, and let the Foot of the Pole 

 be cleared or banked up as the Ground requires, exactly to 

 .this Height, In like manner make a little Spot eaven at the 

 Foot of the Pole S, as you did at for fecting the Level ; 

 and let another Pole be planted at C, according to the Di- 

 Hance fpecified in the Profil, thus repeating the fame Work 

 -at every Station down to D, you drefs all the Lines of your 

 Several Levels. 



Db sekvation. 



This Work being done, affords you only one fingle 

 Line upon the Length of the Hill, and at one of its Extre- 

 mities 5 wherefore, to complete the entire Making of yoiu* 

 Ground, the following; Pradice muft be added. 



THE SECOND PRACTICE. 



To make the whole Ground of a Hill breadthwife^ cutting it 

 into TerraJJes^ fupported by Walls of Mafonry. 



Suppose the foregoing Work to be done from the Top 

 F I G. VI. of the Hill y4, where the Building ftands, to the Bottom 



in as many Stations as there are Terraffes ; you muft do as 

 much at the other EndF, firft making a Level Line from A 

 to F\ near a Parallel to the Building. Place the Level upon 

 the Line fixing a new Stake to bear the Rule, and 



make 



