for Gardeners, &c: 87 



with that Face upwards, with the Point of 

 560 Degrees next you 3 the Center of thofe 

 Divifions will therefore be the Hole in the 

 Middle of the Inftrumcntj In any Part of the 

 Field, as at O, place the Inftrument, and 

 move it about, 'til the Needle lie on the 

 North and South Line of the Chart, and then 

 fcrew the Table fall, fixing a Pin in the 

 aforefaid Hole 5 dired the Index and Sights 

 thereby to A, and the Qiiantity cut on the 

 Frame, will be ^5 Degrees 5 to B 97 Degrees 

 go Minutes, to C 165 Degrees go Minutes^ 

 and to D 254 Degrees 30 Minutes, Meafure 

 O A2 ch. 2511., OBg ch. 18 11., OC^ch, 

 40 li., and O D 2 ch. 70 li. 3 and then thefe 

 will be your Field-Notes : 



From whence protraft the Work thus: 

 Draw the Lines W E and N S at right An- 

 gles 5 becaufe the Line N S reprefents the 

 Line palling thro' the Points of 360 and 180 

 Degrees in the Table, the Diameter of the 

 Inftrument muft therefore be plac'd ob S N, 

 and its Center in O ^ and then prick off the 

 Angles, A 25 Degrees, B 97 Degrees, C 165 



G 4 Degrees 



