ESTIMATING THE YIELD. 



203 



In the remarks column, entries may be made as to where 

 the lot is situated, for instance, on the upper, middle or lower 

 road, through the depot, or felling-area. 



The numbering book for firewood should run as follows : 



No. nflot. 





Class. 



Quality. 



Quantity. 



2. 



The quantity of produce from a felling-area may be 

 estimated in different ways, according to the cubic contents, 

 or dimensions of the lots. 



(a) Each Lot a Separate Piece. When each lot is formed 

 by a separate piece, the volume of the pieces must be 

 estimated separately, either by calculating their cubic contents, 

 or their dimensions. 



i. f'i//>fr f'finfc/ifx. 



In Germany, France, and some other countries, the cubic 

 contents of timber nre always measured by the cubic meter, 

 but in England, India and North America by the cubic foot. 

 Without complicating the procedure by considering logs as 

 truncated paraboloids, the simple method is adopted always 

 of multiplying the sectional area at the middle of the log by 

 its length. The cubic contents alone, however, are no exact 

 indication of the value of a log, its length and thickness and 

 the diameter of its smaller end must be also given. 



It is customary on the continent of Europe to measure the 

 length of logs in meters, and even decimeters (m. 02, 0'4, O'G, 

 etc.) ; the diameter in centimeters, and the cubic contents in 

 cubic meters to two decimal places. 



[In Knglish measure, the length of logs is given in feet ; the 

 diameter, or quarter-girth, in inches, and the volume in cubic 



