

ORIGIN AND USE OF THE LOG RULES. ol 
The Twenty-four Inch Standard Rule. 
This rule is based on a standard log 24 inches in diameter in- 
side the bark at the small end and 12 feet long. The standard 
log contains 300 feet, board measure, according to the Doyle Rule. 
In the use of this rule timber is usually sold by the standard or 
by the 300 feet, instead of by the thousand feet as commonly. 
The logs are scaled by the Doyle Rule and the total number of 
feet divided by 300, the unit of sale being a certain sum per 
standard. To obtain the value of the odd number of feet the 
latter are divided by 300 and multiplied by the price per standard. 
The table which follows will be found convenient for the rea- 
son that the exact number of standards or fractions of a standard 
can be found directly without reference to the Doyle Rule. 
The Twenty-four Inch Standard Rule. 
BasED ON TWELVE-FOOT LOoGs. 


DIAMETER IN INCHES. 

CoS | 6 | 7 | 8 | 9 | 10 | 1s ees os 

CONTENTS IN STANDARDS. 
| Length in feet. 
| | | 
10..| 0.02 | 0.03 | 0.05 | 0.07 | 0.09 | 0.12 | 0.15 | 0.18 
. SNE pers 6 OS 710! 213+ 16 |" .19 
eee ee 09 Fd 4 | 17 | 21 |? 25 
pee te 0 0 0] 12 | 5 | *. 18 |. 23-|* 27 
eee ee 07 1 13}. 16 | 219 | 24) 229 
Mace Oa tees 14 | -.17 | 620 | 226) 3a 
i Oe) 12 15 | 218 | 22) | 228) 238 
eee 06 09 FS | 16 | .19'|. .22.| 280 |. 236 
Pee 09 14 16 | 20 | 223) -. 8h | 
ee eee 0 AO 14 | .17:| 21) -.241 .388 |} _.40 
ee nse rel | 15-|. .18.|- 22 | .25'| 1385 |: 42 
ieee Or ere 161 19) .23 | .26 | > .36 | 440 
eee ii -| 17 | 2.20 | 24.|. .27 | .38 
ee eee ere | 21 | 5 | 228 | .40 
eee ee Pe IR | 22) 26 | 229 | .41 



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