128 A MANUAL FOR NORTHERN WOODSMEN 



STRAIGHT TRAVERSE ACROSS SECTION. ELEVATIONS BY BAROMETER 

 CORRECTED BY BAROGRAPH 



map will be found a great saving of labor and an aid to 

 clearness. 



8. The map is best worked up on the ground. The 

 added accuracy and certainty gained in this way more than 

 pay for the cost of carrying necessary equipment around. 

 The topography may be drawn in pencil on the final 

 manuscript sheet, and an outline sketch on any kind of 

 paper will serve to gather up the timber notes temporarily. 



