for Gardeners, &c. 6^ 



End of them, fliall alfo cut the faid Brafs 

 Hole. 



Box ^nd Needle. 



To one of the Sides of the Inftrument is 

 fix'd a Box, with a Chart containing a circu- 

 Jar Oivifion of 360 Degrees, fubdivided into 

 the 32 Rhumbs, or Points of the Compafs, 

 and againft each Point is its Name. The mag- 

 netic Needle plays on a Pin in the Center of 

 the Chart. This Needle, when well touch'd 

 by the Load-ftone, always regarding the North 

 and South Points 5 you are therefore to move 

 your hiftrument about, 'til you obferve the 

 Needle to hang over the North and South 

 Line of the Chart, and then is your Table 

 due Eaft and Weft, North and South. 



The Inftrument being thus truly plac*d,you 

 are then enabled to take the Number of De 

 grees, which any Object makes with your 

 Center in the Inftrment, and to protrad them 

 at any Time, in Cafe the Weather be bad 

 when you Survey. 



The Index. 



'Tis a Piece of Wood of two Foot long, 

 and about one Inch --r broad, having a fiduci- 

 al Edge, for better drawing Lines with Ink 5 

 to each End belongs a perpendicular Sight, for 

 cutting Objeds with, and finding Angles. On 

 this Inftrument are ufually laid down Lines of 

 Chords to two Radii ; and next thofc, Lines 



F of 



