52 WILLIAMS. 



Table TV. — Analyses of hark of Brugidera parviflora W. d A. a 



Sample No. 



Diam- 

 eter of 

 tree. 



Parts per 100 of water-free 

 material. 



Insol- 

 uble. 



Total 

 extract. 



Non- 

 tannin. 



Tan- 

 nin. 



6 



12 . .. 



■20 - 



Cm. 

 20 

 22 

 25 

 25 

 25 

 35. 

 25 

 30 

 22 

 30 

 22 

 20 

 30 

 20 



. 81.4 

 87.2 

 .86.5 

 85.1 

 84.4 

 82.8 

 78.3 

 85.4 

 82.4 

 78.8 

 84.3 

 85.7 

 81.6 

 85.7 



18.6 

 12.8 

 13.5 

 14.9 

 15.6 

 17...2. 

 21.7 

 14.6. 

 17.6 

 21.2 

 15.7 

 14.3 

 18.4 

 14.3 



8.0 

 5.6 

 6.1 

 6.8 

 7.0 

 8.8 

 8.6 

 5,9 

 6.9 

 8.8 

 7.3 

 7.7 

 10.0 

 6.6 



10.6 

 7.2 

 7.4 

 8.1 

 8.6 

 8.4 



13.1 

 8.7 



10.7 



12.4 

 8.7 

 6.6 

 8.4 

 7.7 



21 - — . . 



30 



31 -_ 



38 — 



41 



59 



62 _ -_ _. 



70 



71 



74 _ - . . 



76 - - - 



Average, _ „ 



2.5.0 



83.6 



16. 4 



7.3 



9.1 





" An average tree will yield bark to the value of 1.63 pesos. One ton of fresh bark is 

 worth 16.30 pesos. See footnote "a" to Table I. 



A composite of the above samples showed 5.6 per cent of "reds." 



Ceriops tagal (Perr.) C. B. Eobinson. Tangal (Tagalog). 



Tangal is now scarce in the Sibuguey Bay region. Its bark is highly 

 prized by the natives for coloring rice and "tuba," and for dyeing. The 

 wood is also of more value than any other mangrove. The charcoal 

 supply of the Islands largely is made from it. Commercially, it is a 

 negligible factor in this region. 



Table T. — Analyses of hark of Ceriops tagal {Perr.) G. B. Robinson. 



Sample No. 



Diam- 

 eter of 

 tree. 



Parts per 100 of water-free 

 material. 



Insol- 

 uble. 



Total 

 extract. 



Non- 

 tannin. 



Tan- 

 fhn. 



8 - 



Cm. 

 15 

 37 

 12 

 30 

 30 



54.5 

 51.7 

 59.2 

 54.0 

 58.9 



45.5 

 48.3 

 40.8 

 46.0 

 41.1 



11.8 

 11.1 

 17.0 

 14.7 

 10.6 



33.7 

 37.2 

 23.8 

 31.3 

 30.5 



34 



35 



36 - 



39 



Average __ _._ 



25.0 



55.7 



44.3 



13.0 



31.3 





