46 MUCK CROPS 



Farmer May Use Level. Familiarity 

 with the level and the methods of handling 

 it and of recording the notes may enable a 

 farmer to do his own surveying. A sur- 

 veyor's level and tripod may be purchased 

 for $10 or more. A $50 instrument would 

 give satisfaction and may be the purchase 

 of five neighbors cooperating. Accurate 

 readings may be made with this instrument 

 on a rod held 20 rods away. 



How To Use Level. Suppose that points 

 A and C are 80 rods apart and it is desirable 

 to know how much higher or lower C is 

 than A. Set up the level firmly at X, 20 rods 

 from A, and center the bubble. Have the 

 rodman hold the rod on a firm stake driven 

 flush with the ground at A. Read the rod 

 where a level line from the instrument 

 strikes it. This is a back-sight reading and 

 is 6.32 feet (about 6 feet 4 inches). This 

 means that the instrument is 6.32 higher 

 than A. Assuming for convenience that A 

 has an elevation of 50, the height of the in- 

 strument is then 50 plus 6.32 or 56.32. Now 

 drive a stake at B, 20 rods from the instru- 

 ment and point the level at a rod held on it. 

 Be sure that the bubble is centered and read 



