16 cox. 



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



Fuel value. 



Kind of wood. 



Specific 

 gravity. 



Reference. 



Good (sp. gr., 0.60 

 to 0.75). 



Black walnut {Juglans nigra Linn.) 



Oak: 



Red oak (Quercus rubra Linn.) 



Spanish oak (Q. digitata (Marsh.) Sudw.) 



(Q.falcata Michx.) 



Pin oak {Q.palustris DuRoi) 



Black oak (Q.velufina Lam.) (Q. tinctoria 



Bartram ) 



Water oak (Q. m'ffro Linn.) (Q. aquatica 



Walt.) 



Scarlet oak (Q. eoccinea Wang.) 



Willow oak (Q. phellos Linn.) 



White oak (Q. alba Linn.) 



Bur oak (Q. mocrocarpa Michx.) 



0.609 



0.657 



0.690 

 0.690 



0.706 



0.722 

 0.738 

 0.738 

 0.738 

 0.738 



B. & B. 1, p. 483. 



B. &B. l,p. 516. 



B. &B. 1, p. 518. 

 B. & B. 1, p. 516. 



B. &B. 1, p. 517. 



B. & B. 1, p. 519. 

 B. & B. 1, p. 517. 

 B. & B. 1, p, 519. 

 B. & B. 1, p. 520. 

 B. & B. 1, p. 521. 



Very good (sp.gr., 

 0.75 to 0.90). 



Yellow oak (Q. platanoides (Lam.) 



Sudw.) {Q. bicolor Willd.) 



Basket oak (Q. michauxii Nutt.) 



Over-cup oak {Q. lyrata Walt.) 



Post oak (Q. mino)' (Marsh.) Sarg. ) (Q. 



obtusiloba Michx.) 



Hickory: 



Shagbark hickory (Hicoria ovata (Mill.) 



Britton) 



Mockernut hickory {S. aWa (Linn.) Brit- 

 ton) 



Pignuthickory (if. glabra (Mill. ) Britton). 

 Bitter nut hickory {R. minima (Marsh.) 



Britton) 



Pecan hickory (i7.peca'rt(. Marsh.) Britton) 

 Osage orange {Madura pomifera (Raf.) 



Schneider) { Toxylon pomiferum Raf.) 



Persimmon {Diospyros virginiana Linn.) 



Eucalyptus {Eucalyptus globulus Labill.) 



0.770 

 0.802 

 0.834 



0.834 



0.834 



0.818 

 0.818 



0.754 

 0.722 



0.770 

 0.786 

 0.876 



B. &B. 1, p. 521. 

 B. & B. 1, p. 522. 

 B. & B. 1, p. 521. 



B. & B. 1, p. 520. 



B. &B. 1, p. 485. 



B. &B. l,p. 486. 

 B. &B. l,p. 487. 



B. & B. 1, p. 485. 

 B. &B. 1, p. 484. 



B. & B. 1, p. 529. 

 B. & B. 2, p. 597. 

 {') 



" U. S. Dept. Agr., For Ser., Cir. 179, 12. The average water content of the samples 

 was 21.6 per cent. 



Table IX. — Approooimate fuel value of Philippine firewoods. 



Fuel value. 



Kind of wood. 



Specific 

 gravity. 



Reference. 



Poor (sp.gr., 0.25 to 

 0.45). 



Rain tree {Pitfiecolobium saman Benth.) 



0.417 



Watt," 61, p. 283. 



Fair (sp. gr., 0.45 to 

 0.60). 



Tambu Tambu (X)/ioca77)wssp.) 



0.581 

 0.546 

 0.498 



This paper, p. 12. 

 This paper, p. 12. 

 This paper, p. 12. 



Lumbavao (TomeKaJatJani'ca Bl.) 





Bayub {Pterospermum sp.) 



'Dictionary of the Economic Products of India. Calcutta (1885-1896). No idea 

 of the water content of the wood is given, but I presume that in most cases the wood 

 was air dry. 



