9 z Ipfirumental InJlruHions 



The Vfe of the foregoing TABLE. 

 What is the Length of 5 Chains 77 Links ? 



Tards. 



Againft 5 Chains is ■ — . no 



50 Links • 1 1 



25 Links ~ 5 5 



2 Links — o 45 



Sum 126 95 



Contrary: In 126 Yards y/^, how many 

 Chains and Links? 



Ch Li, 



Againft iso Yards is — 5 c 



II Yards ^ — — o 50 



5 Yards o 25 



6 Parts ' — c 3 



2 Parts -- — — o I 



5 79 



To protraEl tJj^ aforefald Road. 



Thro' any Point, as A, draw an Eaft and 

 Weft Line,, S A G, the Diameter lying with 

 its Center 00 A and SAG, cutting 90 De- 

 grees in the Limb or Semicircle 5 I fay the Di- 

 ameter fhajl then reprefent the North and 

 South Line 3 and becaufe Station B cuts 1 1 

 Degrees 30 Minutes North Weft, let the Se- 

 micircle Jye to the Weft from the upper or 

 North End of the Diameter, reckon 1 1 Deg, 

 30 MinuteSj, which prick off3 and draw the 



occult 



