ECONOMIC POSSIBILITIES OF MANGROVE SWAMPS. 51 



Table III. — Analyses of Bruguiera gymnorrhisa Lam. and B. eriopetala 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. 



22 



Cm. 

 50 

 60 

 60 

 35 

 60 

 75 

 30 

 37 

 30 

 37 

 50 

 70 

 40 



63.0 

 51.2 

 51.6 

 58.4 

 50.3 

 51.5 

 70.7 

 60.9 

 63.8 

 55.8 

 64.8 

 46.5 

 53.4 



37.0 

 48.8 

 48.4 

 41.6 

 49.7 

 48.5 

 29.3 

 39.1 

 36.2 

 44.2 

 35.2 

 53.5 

 45.6 



8.5 



9.8 



11.0 



13.9 



11.8 



11.9 



7.2 



9.7 



9.0 



12.2 



7.0 



11.8 



12.3 



28.5 

 39.0 

 37.4 

 27.7 

 37.9 

 36.6 

 22.1 

 29.4 

 27.2 

 32.0 

 28.2 

 41.7 

 33.3 



32.4 



23 



29 „ .- „ 



32 - - - 



33 — 



37 



40 



42 



46 



49 



58 . — 



67 



75 .- — - 



Average 



46.5 



57.2 



42.8 



10.4 





» An average tree will yield bark to the value of 9.70 pesos, 

 is worth 51 pesos. See footnote "a" to Table I. 



One ton of fresh bark 



A composite of above samples showed 0.3 per cent '"reds." 



Bruguiera parviflora W. & A. 



The common name is langaray or hagalay. It is a tall, slender tree 

 growing in \ery even stands and very plentiful^. Its maximum dia- 

 meter is about 30 centimeters, the average diameter 20 to 23 centimeters. 

 An average-sized tree yielded 100 kilograms of fresh bark of dark red 

 color, very fibrous in structure, and containing 35 to 40 per cent of 

 moisture. The wood is lighter in color and weight than bacauan and 

 pototan and somewhat softer. It contains 1 to 2 per cent of tannin. 



