PHILIPPINE FIREWOOD. 15 



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



Fuel value. 



Kind of wood. 



Specific 

 gravity. 



Reference. 



Fair (sp. gr., 0.45 

 to 0.60). 



Gum: 



Sour gum, black gum {Nyssa sylvatica 

 Marsh.) _ . 



0. 642 



0.465 

 0.594 

 0.577 

 0.596 



0.497 



0.562 



B. & B. 2, p. 547. 



B. & B. 2, p. 547. 

 B. & B. 2, p. 193. 

 B. & B. 2, p. 390. 

 B. &B. l,p. 528. 



B. & B. 2, p. 97. 



B. & B. 2, p. 194. 



Gum {N. aquatica Linn.) {N. uniflora 

 Wang.) , 



SweetgnmiLiquidambarstyracifluahinn.)- 

 Bolly (Ilex opaca Ait.) — 



Mulberry {Morus rubra Linn. ) 



Sassafras (Sassafras variifolium (Salisb.) 



Kuntze) (S. sassa/rus (Linn.) Karst.) 



Sycamore (button-ball tree) (Platanus occi- 

 dentalis Liuu.) __ 





Good (sp. gr., 0.60 

 to 0.75). 



Very hard pine: 



Longleaf pine (Pinuspalustris Miller) 



Larch or tamarack: 



Tamarack (Larixamericana Michx.) 



Tamarack (L. occidentalis Nutt.) 



0.700 



0.624 

 0.741 

 0.642 



0.738 

 0.673 



0.690 

 0.610 

 0.513 



0.657 



0.626 



0. 626 

 0. 754 



0.706 

 0.690 



0.754 

 0. 657 

 0.577 

 0.594 



0.722 



0.690 



0.650 

 0.722 

 0.690 

 0.754 



Penhallow, p. 344. 



Penhallow, p. 278. 

 Penhallow, p. 277. 

 B. & B. 1, p. 526. 



B. & B. 2, p. 294. 

 B. & B. 2, p. 260. 



B. & B. 2, p. 398. 

 B. & B. 2, p. 397. 

 B. &B. 2, p. 397. 



B. & B. 2, p. 601. 



B. & B. 2, p. 601. 



B. & B. 2, p. 602. 

 B. & B. 2, p. 602. 



B. & B. 2, p. 601. 

 B. & B. 1, p. 514. 



B. &B. 1, p. 510. 

 B. &B. 1, p. 510. 

 B. & B. 1, p. 509. 

 B. &B. l,p. 509. 



B. & B. 1, p. 506. 



B. & B. 2, p. 261. 



B. & B. 1, p. 524 

 B. & B. 1, p. 524. 

 B. &B. 1, p. 525. 

 B. & B. 1, p. 525. 



Hackberry (CeUis occidentalis Linn.) 



Locust: 



Black locust (Sobinia pseudacacia Linn.). 



Honey \ocu&t (Gleditsia triacantkosUnn.). 

 Maple: 



Sugar maple (Acer saceharum Marsh.) 



Red maple (A. rubrum Linn.) 



Silver maple (A. saccharinum Linn.) 



Ash: 



White ash (Fiaxinus americana Linn.) 



Red ash (F. pennsylvanica Marsh. (F. 

 pubescen.sLa.in.) 



Black ash (F. nigra Marsh.) (F. sambucifo- 

 lia Lam.) 



Blue ash (F. quadrangulata Michx.) 



Green ash (F.lanceolataBoic^.) (F.viridis 

 Michx.) .. 



Beech (Fagus americana Sweet) . 



Birch: 



Cherry, black, sweet birch (Betula lenta 

 Linn.) 



Yellow birch (B. lutea Michx.) 



Red birch (B.Migrra Linn.) 



Canoe birch (B. papyrifcra Marsh.) 



Hornbeam: 



Blue beech (Carpinus caroliniana Walt.)-_ 

 Coffee tree (Gymnocladus dioica (Linn.) 

 Koch) (<?. canadensis Lam.) 



Elm: 



White elm ( Vlmus americana Linn.) 



Rock elm ( V. racemosa Thomas). 



Red elm (U.fulva Michx.) 



Winged elm ( U. alata Michx.) 



