FOREST RESERVE MANUAL. 



45 



men and axman, will usually be found most convenient in lay- 

 ing out blocks. Since the work does not require absolute 

 accuracy no rodman is necessary, the axman simply being^ 

 kept in line as he blazes ahead of the others. 



Fig. 1.— Black Hills Reserve. NE. i sec. 14, T. 2 N., R. 3 E. 



In chaining boundaries the chain need not be broken in 

 order to secure horizontal measurement, as in ordinary land 

 and railway surveying. In most cases it will be sufficient to 

 allow it to drag loosely on the ground, although more care 

 must be taken in exceedingly steep or rocky places. 

 ■ In the absence of a surveyor's chain a strong cord may be 

 used, the quarters and halves being marked by knots or bits. 



