NOTES TO TABLE i, TABLE 2, TABLE 3. 



It is well known among millmen that neither Doyle's Log 

 Rule, nor the Lumbermen's Favorite Rule, nor Scri'bner's Log 

 Rule, are sufficiently exact to serve as a basis for calculation 

 relative to the output of lumber from logs. 



During the past few years I sawed up nearly 1000 sample 

 logs of yellow poplar cut in Pisgah Forest, Western N^orth 

 Carolina, noting carefully thelactual output secured from each 

 single log. 



The foUovdng tables, 1, 2 and 3, show the contents for 12- 

 foot logs, 14-foot logs and 16-foot logs respectively, thus as- 

 certained, and give at the same time, to facilitate comparison, 

 in a second and third column the figures as computed by 

 Doyle's Rule and the Favorite Rule. I did not think it worth 

 while to add Scribner's Rule, which I undersitand is practically 

 out of use. 



'Ro one will buy ore without having a fair knowledge of its 

 actual composition; nor did I wish to have to buy logs without 

 knowing what they really contained. 



The mill of the Biltmore Lumber Co., at which the tests 

 were made, uses a large band saw, cutting a ^ inch kerf. The 

 output consists almost entirely of one-inch boards. 



From the following tables, it appears, that the band saw ob- 

 tains from logs less than 25 inches through more inch stuff, and 

 from logs over 28 inches through less inch stuff than might be 

 expected to be the case according to Doyle's Rule. 



Lumberman's Favorite Log Rule is on the safe side in all 

 cases. 



The reader will find that the actual output from 12-foot 

 logs is not exactly by one-seventh smaller, and that the actual 

 output from 16-foot logs is not exactly by one-seventh largor 

 than the one obtained from 14-foat logs. The deviation, how- 

 ever, is minute and readily explained by any one who is famil- 

 iar wi'th poplar logs. 



