92 



ENGINEERING ON THE FARM 



contain less and are numbered as lots with the exact acre- 

 age specified. Field errors not shown in the records are 

 the cause of sections not containing exactly 640 acres. The 



JV. 89' 'JO'S. 



vr/zW JV.89*50'£. X 



vtfV5' 



Fig. 103. Plat of jour sections in the northwest corner of a township, showing 



lots, meander lines, topographic and other data recorded in the original 



township plats made by the deputy surveyor on a scale of 



2 inches to a mile and filed with his notes 



necessity of designating the lots is due to the errors caused 

 by both curvature and the field work. (See Fig. 103.) 



The west boundaries of the sections are not true north 

 lines, because they are run parallel to the east township 

 lines. The greatest discrepancy in the area of a section, due 

 to curvature, is in the northwest corner of the township 

 lying immediately south of the standard parallel. Curva- 

 ture corrections applied at the standard parallel cause an 



