270 TIMBER MEASURING 



In many parts of the country an allowance of I inch for 

 every foot quarter girth is made for bark ; and J inch for 

 every 6 inches quarter girth. Thus, if a tree girths 1 2 inches 

 or up to 17 \ inches, an allowance of I inch is made. If it 

 girths 1 8 or up to 23 J, I J inches are deducted ; and from 24 

 up to 29!, 2 inches ; and so on. An allowance of i inch to 

 I foot quarter girth is equal to a deduction of \ of the 

 contents as computed if measured over bark. 



This allowance is about correct for thick barked trees 

 such as Oak, Elm, Ash. But, for thin-barked trees, such as 

 Beech or Sycamore, it is really far too much. However, if 

 no agreement has been made upon the subject, the custom of 

 the country must be observed. 



It may be noted that in some parts of the country, as in 

 Buckinghamshire, no allowance whatever is made for Beech 

 bark. 



In order to judge what a reasonable allowance for bark 

 would be, it should be remembered that the correct 

 mathematical allowance is -39 of an inch from the quarter 

 girth for every \ of an inch that the bark is in thickness. 



Booking Measurements of Felled Timber. All measure- 

 ments are, of course, booked, immediately they have been 

 ascertained, into a note-book. Separate pages should be 

 set apart for each species of tree ; and often the various 

 species are divided into two or more classes, according to 

 quality ; but this will usually depend upon the conditions of 

 sale. 



The number of each tree of each species, or of each class 

 of the same species, is separately entered. 



In the majority of cases when measuring felled timber, a 

 different price has been agreed for the same kind of timber, 

 according to its girth ; or according to the contents of any 

 particular log. Separate columns should always be left for 

 filling in the various totals which are to be priced differently. 



Often, small girthed tops are not measured ; but the con- 

 tents are guessed and booked at once. 



The following shows a specimen page, supposing that all 

 timber 12 inches quarter girth and upwards be sold at one 



