The Abnev Hand Level. 



355 



when the same has been found to be out of adjustment. Two 

 methods are illustrated. The first method is the best when it is 

 possible to place two boards or stakes at equal elevations with a 







„j,,j 



Tht t»io jtcWl a<^ 



Tf»t5 at. Itas*. 100 fett af*'^ 



level or a transit. These adjustments can be made in the main 

 camp at the beginning of the years' work, and with care the hand 

 level will remain in adjustment for a long time. If through 

 accident the level is thrown out of adjustment and the crews are 

 in sidecamp where a level or a transit is not available, Method 2 

 will answer the purpose. 



A Simple Method of Working imth the Abney Hand Level. 



This method of keeping field notes is proposed in order to 

 simplify and shorten the work of the compassman. It is recognized 



