26 



LANDS AND SURVEYS 



monument a suitable base-line. This base-line may be 

 placed on one side of the tract if it has a long straight side. 

 Hubs 3 inches square are driven every hundred feet and 

 line and distance are marked by a tack or small nail. 

 It is very desirable to locate this base-line where there 

 is to be no cut or fill. Otherwise it will be disturbed and 



CM Co 



Gridiron System 

 FIG. 



will have to be relocated. The importance of this remark 

 cannot be too strongly emphasized. An auxiliary line of 

 hubs is laid off at right angles from the first one. The 

 lines at right angles to the first line of hubs may be desig- 

 nated by letters, thus A, B, C, etc. The lines at right 

 angles to the second line of hubs may be designated by 

 numbers 0, 1, 2, 3, etc. Thus the corner of any square in 



