84 Inftnmental InflruBions 



noted to be an outward one, or more than i8o 

 Degrees, viz. 200 Degrees ^ therefore, in or- 

 der to protrad: it, apply the Center of the Di- 

 ameter on C5 and againft 20 Degrees, (the Ex- 

 cefs above a Semicircle) to be reckoned from 

 the South End, make a Mark 5 then bring the 

 Diameter of the Inftrument to that Mark, (its 

 Center ftill on C) and at the North End prick 

 a Mark, and draw CD; fet i ch. 45 li. from 

 C to D, fo Ihall Angle C be 200 Degrees. An- 

 gle D is 97 Degrees 3c Minutes 5 place the 

 Center of , the Diameter on D, and move the 

 Inftrum^t about, 'til ()j Degrees 30 Minutes, 

 reckon y fifom the North End, cut C D, ex- 

 tended for this Purpofe to O 5 at the faid 

 North End of the Diameter make a Mark, and 

 draw D E, fo fhall Angle D be 97 Degrees 30 

 Minutes. Sti 2 ch. 65 li. from D to E, An- 

 gle E is I2C Degrees 30 Minutes, the Center 

 of the Diameter on E5 move it about 'til 1 20 

 Degrees 30 Minutes (reckon'd from the North 

 End) cut D E, extended for this Purpofe to S. 

 The Diameter will then cut A F in F, fo 

 (hall A F become 124 Degrees, and E F i ch. 

 75 li. FA will bealfo3 ch. 



The 



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