128 
CONTENTS OF A LOG. 
Where extra inches are not readily convertible into decimals of the foo , use 
the Hoppus method as followsReduce girth to inches; divide by 4, mu ip y 
quotient into itself; multiply by length of log in leet; divide by !-■ 
(c) Log 7' 4" x 25 
7' 4" 
12 
4)88 
22 
22 
44 
44 
484 
25 
2420 
968 
12)12100 
(d) Log 10' 7 
10' 7" 
12 
4)127 
81.75 
31.75 
15875 
22225 
3175 
9525 
1008.0625 
30 
12)30241.8750 
2520.1562 
x 30' 
1008 super ft. (fraction omitted). 
Read as 2520 super, ft. 
NOTES. 
(a) It is often necessary to report quickly on the contents of standing trees. 
Total length of bole and medial girth are carefully estimated for each tree and the 
contents worked out in the ordinary way. 
( I ,) In the timber trade boards less than one inch in thickness are charged at 
superficial rates. 
(c) Ready reckoners for round and sawn timber may be obtained from the 
booksellers. 
( d ) In milling a log into boards, about 20% of its absolute contents are lost 
in saw-cuts and waste. The two formulae here explained allow for this, and show 
approximately the amount of sawn product that will be available for use. It will 
be found that the results closely coincide with those given in the Ready Reckoner 
for Round Timber by Haakon Dahl. 
( e ) A fraction in the contents of a log, if only six inches or less than six 
inches, is disregarded; if more than six inches, it is counted as a foot. 
(/) The scientific forester will ascertain the absolute contents of the log and 
deduct therefrom the estimated loss in milling. His results will be practically the 
same as those obtained by the formulae given above. 
