So Jnflrumental InflruSliom 



The fecond Station being R, I alfo direft 

 the Index to R, which cuts 6 Degrees, which, 

 being in the lower Semicircle, muft be reck- 

 kon d from the Point of Eaft. The Inftru- 

 ment being at R, move the whole Inflrument, 

 (not the Index) 'til the Needle hang over the 

 North and South Line, as before 5 direct the 

 Index to D, and it will cut 86 Deg. to E 179 

 Deg. and to F 145 Deg. (which being in ano- 

 ther Semicircle, muft be reckoned from the 

 Point of Eaft in the Inftrument.) 



From whence your Entries in the Field- 

 Book will ftand as follows : 



From whence prorrad the FielcJ in this 

 Manrjer: In any Parr of your Paper, draw a 

 Line N S, for your North and South Line, 



or 



