CHAPTER VII. 

 MAPS AND RECORDS. 



The drains having been staked out, the grades and 

 cuts figured, and the size and number of the tile fixed 

 upon, a map of the drains should be made which will 

 show their position, length, fall, size of tile, and the 

 physical features of the land through which they pass. 

 The details of farm work are usually executed upon the 

 ground so that complete data is not secured until the 

 work is finished. 



A sketch map can be readily made from the notes 

 which were taken in the field, and will show quite ap- 

 proximately the position of the lines, and should be 

 made and used as a working map in the distribution of 

 tile and in digging the ditches. A copy of the depth 

 figures for each line, with the working map, constitutes 

 the information which will be necessary for any man 

 or set of men to construct the work as laid out. 



The finished map should be made from measure- 

 ments and angles which were taken in the field for that 

 purpose, and should be drawn to a scale and suflSciently 

 embellished to present a creditable appearance. The 

 young engineer who has had no previous training or 

 practice In this work should not fail to take up this 

 branch and study to make his maps and records cred- 

 itable and accurate. 



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