COMPARISON OF SCALED CUBIC CONTENTS 



37 



TABLE II 



Comparison op Per Cents op Cubic Contents of Cylinders Scaled by Various 

 Log Rules, for Logs 18 Inches in Diameter at Small End, with 2-inch 

 Total Taper 



Cylindrical contents measured inside bark 



Log rule 



Basis of measure- 

 ment of cylin 

 der, in applica 

 tion of rule 



at 

 small 



end. 



Per 

 cent 



at 

 middle. 



Per 



cent 



Per cent of scale 

 if measured at 

 other point 



at 

 middle 



at 



small 



end 



Per cent deducted 

 from contents of 

 cylinder to ob- 

 tain contents 

 given in rule — 

 For rules applied 



at 

 small 

 end 



at 

 middle 



Cubic Standards 

 Market or Glens Falls standard 



22-inch standard 



Blodgett or New Hampshire. . . 



Cubic foot — Maine 



Cubic meter — Philippines: 



Short logs 



Long logs 



100 

 100 



Cubic Log Rules for Squared 

 Timbers 



Quarter girth or Hoppus 



Inscribed square 



Two-thirds 



Cube rule, or Big Sandy 



100 



Log Rules Expressed in Board 



Feet but Based on Cubic 



Contents 



Constantine 



Tatarian 



Saco River 



Derby 



Square of Three-Fourths 



Partridge 



Blodgett, converted, ratio 100 

 to 1000 ft. B.M 



63.4 



56.6 



100 

 84.0 

 72.4 

 72.1 

 71.7 

 68.8 



100 

 100 



100 



78.5 

 56.5 



59.7 



89.7 

 89.7 



89.7 



56.9 

 50.8 



89.7 

 75.4 

 65.0 

 64.7 

 64.3 

 61.8 



111.4 

 111.4 



111.4 



87.5 

 62.9 



66.5 











11.4* 

 11.4* 





 11.4* 



12.5 

 36.6 

 37.1 

 43.4 







16.0 

 27.6 

 27.9 

 28.3 

 31.2 



33.5 



10.3 

 10.3 











10.3 

 



21.5 

 43.1 

 43.4 

 49.2 



10.3 

 24.6 

 35.0 

 35.3 

 35.7 

 38.2 



40.3 



* Added. 



