COMPUTATION AND OFFICE WORK 31 



men form a usual party for line work in the northern woods, 

 and from one to three miles a day can commonly be run 

 with it, according to the ground and growth. The usual ex- 

 pense for such work ranges between $6 and $10 per mile. 

 A reliable transit line, on the other hand, cannot be cleared 

 out and run for twice those figures. 



The work of the forest surveyor may be done for the fol- 

 lowing purposes, and the party required for each sort of 

 work, outside of maintenance, is noted in connection. 



1. New work, for the purpose of sale or administration. 

 Party required : compassman, two chainmen, enough men, 

 commonly three, ahead of the compass, with axes and a 

 rod, to keep the rest of the party busy. 



2. Resurvey, for the sake of reestablishing lines and 

 corners, also for getting area. Party : same as above ; or 

 it may be more economical in some circumstances not to 

 employ chainmen, but for the surveyor himself, with one 

 of his party, to go back and do the chaining. 



3. Careful resurvey with the compass of old lines, no 

 chainage required. Party to correspond. 



4. Remarking lines where no great difficulty is expected, 

 but where the lines need freshening. The man in charge 

 and two axemen form an economical party. A small fold- 

 ing sight compass may be used as needed. 



Balance in the party is one element largely influencing 

 cost. The main thing is to have sufficient axemen to give the 

 rest of the party enough to do. Subsistence is an important 

 problem in some circumstances. A chainman can carry a 

 pack on his work, and frequently chainmen are employed 

 on long jobs in the backwoods to carry a portion -of the 

 supplies or outfit. 



SECTION V 

 COMPUTATION AND OFFICE WORK 



1. TRAVERSE 



To " traverse" a line or route is to survey it by any 

 method that ascertains direction and distance. The cir- 



