Comparison of tJic Doyle and Scribner Rules. 



29 



Table No. 2 



ACTUAL MILL TALLY OF LOGS BY LENGTH AND DIAMETER 

 AVERAGES REGULARIZED BY A SERIES OF CURVES. 



In Table 3 tlie values obtaiiied from tlie above tabulations are 

 compared with the scale given for logs of the various diameters 

 by the Scribner and Doyle Rules. The "Per cent. Increase" col- 

 umn is derived by taking the diflference between the values given 

 in the Rules and the actual mill scale, and dividing this difference 

 by tlie value given in the Rules. For instance, for six inch logs 

 the Doyle Rule gives four feet B. M., while the actual scale 

 at the mill was twenty-two feet B. V.. — a difference of eighteen 



Table No. 3. 



PERCENTAGE INCREASE OVER DOYLE AND SCRIBNER LOG 

 RULES SHOWN BY ACTUAL CUT 



Sixteen Foot Logs. 



*Scribner rule values up to and including 10 inches as used by Santa 

 Clara Lumber Co., N. Y. No comparison under 4 inches. 



