6 cox. 



Sample No. 6. — Baeauan tubig {Bmguiera sp. )• Noi botanical material. 

 Sapwood furnished to the United States department quartermaster for fuel at 

 Zamboanga. Diameter of stick, 5 centimeters. Bark varies from 2.5 to 5 

 millimeters in thickness, with about equal parts of all three layers. The layers 

 of bark succeeding one another from without inward adhere more closely. Tlie 

 epidermis adheres very loosely. Where the bark is thickest it is the most 

 scaly and jjerhaps more decayed. The desiccated layers of bark are quite hard 

 and still very brittle. 



Sample No. ?'. — Catutan (Bruguiera sp.) from Cotabato. Diameter of stick, 

 12.5 centimeters with heartwood beginning. Thickness and description of bark 

 identical with No. 6. 



Sample No. 8. — Tabigue (Xylocarpus sp. ). Sapwood furnished to the United 

 States department quartermaster for fuel at Zamboanga. Diameter of stick, 

 10 centimeters. Average thickness of bark, 1.5 millimeters, and there is very 

 little variation. The bark is fairly smooth, the layers adhere closely and the 

 epidermis and iimermost layer are relatively thin. The dri'ed bark is quite 

 brittle. 



Sample No. 9. — ^Bacauan (Bruguiera sp.). Sapwood furnished to the United 

 States department quartermaster for fuel at Zamboanga. Diameter of stick, 7 

 centimeters. The bark varies from 3 to 4 millimeters in thickness, of which the 

 epidermis, middle and inner layers have about the ratio 3 to 2 to 1, respectively. 

 The three layers adhere fairly well, the epidermis the most loosely. The external 

 appearance of the stick is somewhat smooth. The desiccated bark is hard and 

 with the exception of the epidermis is quite brittle. The epidermis may be 

 bent longitudinally almost at right angles before it will break. 



Sample No. 10. — ^Tambu tambu (Xylocarpus sp. ) from Cotabato. Diameter 

 of stick, about 20 centimeters and the heartwood roughly equal to one-third of 

 the cross section. The bark has a uniform thickness of about 2.5 millimeters, 

 of which the epidermis, middle and inner layers have about the relative propor- 

 tions 2 to 3 to 1, respectively. The desiccated layers of bark are hard, not very 

 brittle and adhere closely. 



Sample No. 11. — Pagatpat (Sonneratia sp. ). Sapwood from Cotabato. No 

 bark. 



Sample No. 12. — Lumbayao (Tarrietia javanica Bl.). Second-class firewood 

 from Camp Overton. Sapwood. No heart. 



Sample No. 13. — Bayub (Pterospermum sp.). Sapwood from Mindanao. 



Sample No. I4. — ^Bacauan (Rhizophora conjugata Linn.) from IMindanao. 

 Collected for me by Dr. H. N. Whitford. Bureau of Forestry No. 11534. 



Sample No. 15. — ^Tangal (Ceriops tagal (Perr.) C. B. Rob.) from Mindanao. 

 As above. Bureau of Forestry No. 11535. 



Sample No. 16. — Pototan (Bruguiera gymnorrhiza Lam.) from Mindanao. 

 As above. Bureau of Forestry No. 11536. 



Sample No. 17. — ^Lenggadi (Bruguiera parviflora W. & A.) from Mindanao. 

 As above. Bureau of Forestry No. 11537. 



Sample No. IS. — Pagatpat (Sonneratia sp.). Thoroughly seasoned wood from 

 Palawan. 



Sample No. 19. — Pagatpat (Sonneratia sp. ). Unseasoned wood from Zam- 

 boanga, Mindanao. 



Tables of analj^ses and calorific determinations of these woods are as 

 follows : 



