TABLE XLIII. SOLID CONTENT OP ROUND TIMDER. 



To find the content of this example by the Table, 

 opposite 21 J inches, the quarter girt, under 10 

 feet, stands 



And under 9 feet stands, . , . , . 



651 



Ft. 

 31 



28 



The content, 



59 7 



This way of calculating the content of round timber gives the 

 content less than the truth, in the proportion of 11 to 14, or 

 nearly one-fourth. A considerable portion of what is under- 

 reckoned is no doubt lost in the squaring, and both the buyer and 

 seller being usually aware of the fact, the price is so arranged 

 that there is no great practical loss to either party in following 

 this long-established custom. 



The nett content of round timber may be found by the follow- 

 ing rule: After making allowance for the bark, multiply the 

 square of Jth of the mean girt by twice the length ; the product, 

 after deducting 1 for every 190 feet, will be the nett content. 



The foregoing example, wrought by this rule, Ft. In. 



gives the solid content . . . . 75 10 



Content by the common method, 59 7 



Difference of the two, 



16 



Table XLIV. (which see), furnishes an easy method of ascer- 

 taining the content of round trees with great exactness. The 

 above example is performed by it as follows :-. 



In that Table, opposite the girt 85 inches, or 



7 feet 1 inch, stands 



which multiply by the length in feet, . 



3.993 

 19 



35.937 

 39.93 



Pointing off 3 places of decimals, leaves 75 feet, 

 Multiply the fraction by .... 



And we get 10 inches, and nearly a half inch, . 10.4.04 



