43 



ters inside the bark, so an allowance must be made for bark. 

 An inch is enough allowance to make for most kinds of tim- 

 ber. Suppose in the case mentioned the top diameter of the 

 first log is 15 inches and the second is 13; then they should 

 be reduced to 14 and 12. The next step is to record the 

 logs in a note book in any convenient form. At the end of 

 the work in the woods the logs are scaled by the rule and the 

 totals run up. 



