14 cox. 



Table VIII. — Approximate fuel value of North American woods — Continued. 



Fuel value. 



Kind of wood. 



Specific 

 gravity. 



Reference. 



Poor (sp. gr., 0.25 



Spruce: 







to 0.45). 



Black spruce (Ficea nigra Ait.) 



0.459 



Penhallow, p. 289. 

 Penhallow, p. 285. 

 Penhallow, p. 286. 





White spruce (P. alba Ait.) 



0.405 





White spruce (P. engelmanni Engelm.).._ 



0. 345 





Tide-land spruce (P. sitchensis Carr.) 



0.429 



Penhallow, p. 290. 





Soft pines: 









White pine {Pinus strobus Linn.) 



0. 385 



Penhallow, p. 315. 

 Penhallow, p. 312. 





Sugar pine (P. famberiiana Douglas) 



0.368 





White pine (P. monticola D. Don) : 



0.391 



Penhallow, p. 312. 





White pine (P. flexilis James) 



0.436 



Penhallow, p. 313. 





Basswood (American linden): 







Basswood (Tllia americana Linn.) 



0.449 



B. &B.,«2, p. 414. 





White basswood ( T. heterophylla Vent.) ._ 



0.417 



B. & B., 2, p. 414. 





Buckeye (horse chestnut): 









Ohio buckeye [Aesculus glabra Willd.) 



0.449 



B. & B., 2, p. 401. 





Sweet buckeye (A. octandra Marsh.) 



0.433 



B. & B., 2, p. 401. 





Butternut (Juglans cinerea Linn.) 



0.401 



B. &B., l,p. 484. 





Catalpa {Catalpa speeiosa Warder) 



0.417 



B. & B., 3, p. 200. 





Poplar (Cottonwood): 









Cottonwood (Popidus deltoides Marsh.) 









(P. monilifera Ait.) 



0.385 



B. & B., 1, p. 493. 

 B. & B., 1, p. 491. 

 B. & B., 1, p. 492. 





Balsam (P. balsami/era Linn.) 



0.369 





Poplar (P. grandideniata Michx.) 



0.385 





Aspen (P. tremuloides Michx.) 



0.401 



B. & B., 1, p. 492. 





Willow: 









Black willow {Salix nigra Marsh.) 



0.449 



B. & B., 1, p. 494. 





Peach-leaved willow (S. amygdaXoides 









Anders.) 



0. 449 



B. &B., 1, p. 495. 



Sandbar willow, river bank willow (S. 





fluviatilis Nutt.) 



0.497 



B. &B., l,p. 497. 



Glaucous willow, pussy willow (S. dis- 





color Muhl.) 



0.433 



B. &B., l,p. 499. 



Tulip wood: 





Tulip tree {Liriodendron tulipi/era Linn.). 



0.417 



B. &B., 2, p. 49. 





Cucumber tree ( Magnolia acuminata Linn. ) 



0.465 



B. & B., 2, p. 48. 



Fair (sp. gr., 0.45 



Red cedar {Juniperus virginiana Linn.) 



0.493 



Penhallow, p. 246. 



to 0.60). 



Hard pines: 



Longleaf pine. (See under "Good.") 









Bull pine {Pimis ponderosa Lawson) 



0.471 



Penhallow, p. 335. 





Loblolly pine (P. taeda Linn.) 



0.544 



Penhallow, p. 343. 





Pitch pine (P. rigida Mill.) 



0.515 



Penhallow, p. 319. 





Douglas spruce {Pseudotsuga douglasii 









Carr.) . 



0.516 

 0.577 



Penhallow, p. 272. 

 B. & B. 2, p. 253. 



Cherry (Prumis serotina'Eb.Th.) 





Chestnut: 









Che-stnut {Castanea deniaia (Marsh.) 









Borkh.) 



0.449 



B. & B. 1, p. 515. 





Chinquapin (C.pumila (Linn.) Mill.) 



0.593 



B. & B. 1, p. 515. 



' Britton, N. L., and Brown, A., 

 New York (1896-98). 



Illustrated Flora of the Northern States and Canada, 



