BALSAM FIR, 53 



CONVERTING FACTORS OP STACKED MEASURE INTO CUBIC FEET. 



The following factors can be used for converting stacked measure 

 into cubic measure : 



For cords made up of billets 4 feet long and from 4 to 7 inches in 

 diameter, 0.72, 



For cords made up of billets 4 feet long and from S to 12 inches in 

 diameter, 0.76, 



In order to convert a cord of ordinary pulpwood into cubic measure, 

 128 feet should be multiplied by 0.74, the average converting factor 

 for pulpwood. 



FORM FACTORS. 



Tables 38 and 39 give breast-high form factors for Maine and for 

 New York. 



Table 38. — Form factors {hreast high) for New York. 





Height of tree (feet). 



Diameter breast high (inches). 



20 



30 



40 



50 



60 



70 



j 80 





Form factor. 



3 



0.552 



.547 

 .542 



0.551 

 .546 

 .541 

 .535 

 .529 













4 



0.546 

 .541 

 .534 

 .527 

 .519 











5 



0.539 

 .533 



. 525 

 .516 

 .507 

 .498 

 .488 









6 



0.5.30 

 .522 

 .514 

 .505 

 .496 

 .486 

 .475 

 .465 

 .454 

 .445 

 .436 



0.527 

 .520 

 .512 

 .503 

 .494 

 .484 

 .474 

 .464 

 .454 

 .444 

 .435 





7 





0.518 



8 





.510 



9 







.501 



10 









.492 



11 









' .483 



12 









.473 



13 











.463 



14 











.453 



15 











.444 



16 











.435 















Table 39. — Form, factors {breast high) for Maine. 





Height of tree (feet). 



Diameter breast high (inches). 



40 



50 



60 



70 



80 





Form factor. 



7 



0.531 



.517 

 .502 



0.539 

 .525 

 .510 

 .484 

 .478 



0.546 

 .531 

 .519 

 .504 

 .490 

 .475 

 .460 

 .444 

 .428 

 .412 



0.553 

 .541 

 .528 

 .515 

 .501 

 .488 

 .474 

 .459 

 .444 

 .430 





8 



0. 549 



9.... . 



.537 



10 



.525 



11 





.512 



12 





.500 



13 







.487 



14 ... 







.473 



15 







.459 



16 







.445 











BARK VOLUMES. 



Table 40 gives the volume of bark of trees of different diameters 

 and heights. On the whole, bark makes up about 10.6 per cent of 

 the total volume of the tree. 



