LUMBER STATISTICS: NEW YOKE CANALS. 

 Other official rules for reduction. 



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The following general rules are also laid down for tlie guidance of 

 officers in charge of the New York canals in converting measurement 

 into tonnage : 



1. To reduce feet of boards and scantling to tons. — Divide the number ot feet by 6, and 

 point oflt' two figures from the right as decimals. (This rule is based on a general 

 average of 3^ pounds to the foot = 600 feet to the ton = 1.6 tons per 1,000 feet.) 



2. To reduce shingles by the thousands, to ions.— Divide the number of thousands by 8. 

 (This assumes a thousand shingles to weigh 250 pounds.) 



3. To reduce cubic feet of timber to <ok8.— Divide the nurnber of cubic feet by 5 and 

 point olf one figure. (This assumes the cubic foot to average 40 pounds in weight.) 



To reduce cords of wood to <o«8.— Multiply the number of cords by 28 and point off one 

 figure. (This assumes that a cord weighs 2f tons, or 4,250 pounds, or about 33^ pounds 

 to the cubic foot.) 



To reduce barrels of pot and pearl ashes to ions.— Multiply the number of barrels by 275 

 and point off three figures. (This assumes that a barrel of pot or pearl ashes weighs 550 

 pounds = 3.63 barrels to the ton.) 



Tons of forest products carried on New Yorlc canals from points within the State. 



