74 Injlrumental InflruBions 



VrotraSwn of this Work 



DraV an Eaft and Weft Line, A R, at 

 rieafure 3place the Diameter of the Protraflor 

 therein, and its Center on any Point therein 

 A : prick off 47 Deg. (reckon'd from the 

 Point of 90 Degrees in the Inftrnment) N. E. 

 and draw A B : fet-6Ch. :^5 Li. from A to B, 



Make an Eaft, and Weft Line to run fhrd' 

 B, place the Diameter thereon, and its Center 

 in B: prick off 85 Degrees goMinutes frecjc- 

 on'd from the Point of 90 Degrees, S. E.)' arid 

 draw BC5 fet I Ch. 50 Li. fromBtoC; 



Make an Eaft and Weft Line to run thro* C, 

 place the Diameter thereon, and its Center on 

 C : prick off 17 Degrees 50 Minutes, (reck- 

 oned from the Point of 90 Degres S. E.) and 

 draw CD: (et 4 Ch. 10 Ll from C to D. 



Draw D A of Courfe, which will appear to 

 be 7 Ch. 44 Li. 



Thus haveyou the Shape of the Field, and, 

 in Order to get that of the Hill, the Inilru- 

 tnent being in Point A, the Bearing to g,i the 

 Footof the Hill, was 70 Degrees N. E. which 

 prick off, and draw A g ^ fet 3 Ch. 35 Line^ 

 from A to g, the other Points, S w u, b«?ing 

 found as ealily by referring to the Fiefd-bdofe^ 

 I make the Foot of the Eiill to run through 

 gS wu, and Ihadow it, asiin the Figure] ;tp 

 denote that it is an Hill. ' ! -^: 



To 



