210 Forestry Quarterly. 



number is deciphered as follows, 421 1 is the number of the block 

 (an arbitrary number) in which lay the tract under examination; 

 62 is the number of the strip line ; and 12 plus 740 indicates that 

 the point is 740 links from acre 12 and is in acre 13. As this line 

 was being run toward the zero end, the first sight on the line was 

 one of 140 links to stake 3, or 600 links (200 link chain being 

 used) from acre 12. It will be seen from the accompanying sheet 

 that but two contours were crossed — the 2,900 foot at a point 

 between stakes 2 and 3 in acre 42116212 — and since the difference 

 in elevation was 26 feet, the contour would be close to stake 3 ; 

 and the 2,850 foot at a point between stakes i and 2 in acre 

 42116211, and very close to stake i. Thus was the work done 

 easily and accurately with only the regulation chain crew. 



Work of this kind is judged by the difficulties attendant upon 

 it, and the results obtained by it. 



Experience on this particular piece of work showed that the 

 results obtained during the winter were not as accurate as those, 



