42 MEASUREMENT OF STANDING TREES. 



for the purpose ; but neither this nor any other instrument 

 works with sufficient accuracy. Moreover, the stems of many 

 trees are irregularly shaped, so that two or more places may 

 have the desired diameter, apart from the fact that in many 

 cases trees divide into two or more branches before the 

 diameter has fallen to J of the diameter at chest-height. 



