﻿PHILIPPINE FIBERS. 87 



Table No. 4. — Proximate analyses of Philippine wood's and some commercial pidp ivoods. 



PHILIPPINE WOODS. 



Kind of wood. 



Water. 



Aqueous 

 extract. 



Alcohol 



ether 



extract. 



Cellu- 

 lose. 



Inerust- 



ing 

 matter. 



Ash. 



Lauan ___ 

 Mayapis. 

 Cupang__ 

 Dita 



Per cent. 

 11.23 

 11. 50 

 13.33 

 10.41 



Per cent. 

 3.85 

 4.50 

 3.45 

 4.19 



Per cent'. 

 2.72 

 1.20 



1.17 

 .60 



Per cent. 

 61.71 

 55.73 

 60. 56 

 49.94 



Per cent. 

 19.57 

 28.24 

 19.41 

 33.87 



Per cent. 

 0.89 



2.03 

 .99 



SOME COMMERCIAL PULP WOODS. " 



Scotch pine__ 

 Block poplar . 



Silver fir 



Bass-wood 



Spruce 8 



12.87 

 12.10 

 13.87 



4.05 

 2.88 

 1.26 



1.63 



1.37 



.97 



53.27 

 62.77 

 56.99 



28.18 

 20.88 

 26.91 



10.10 

 f 11. 31 



3.56 

 ) 



3.93 



53.09 

 f 52. 96 



29.32 

 35.41 



I 11. 48 



\ 4.83 



3.28 



I 53. 08 



35.19 



[ 11. 26 



I 





1 52. 98 



35.46 



0.32 

 .25 

 .30 



SODA WOOD PULPS. 



One-kilo lots (2.2 pounds) of wood were barked, chipped and cooked 

 in the model digestor, washed, screened and molded into 7 by 10 inch 

 boards. These were first air-dried and weighed, then repulped and 

 beaten in a small hollander, bleached and formed into unsized handmade 

 sheets. 



Table No. 5. — Experiments tuitli lauan. 



Exper- 

 iment 

 No. 



Caustic 



soda 

 solution. 



Caustic 

 soda cal- 

 culated on 

 weight of 

 material. 



Duration 



of di- 

 gestion. 



Pressures 

 carried. 



Yield of pulp. 



Bleaching 

 powder 



con- 

 sumed. 



Loss of 

 weight in 

 bleach- 

 ing. 



Un- 

 bleached. 



Bleached. 



1 

 2 

 3 



4 

 5 



Per cent. 

 10 

 7.5 

 5 



3.75 

 3.5 



Per cent. 

 25 

 22.5 

 20 

 15 

 12.5 



Hours. 



9 

 11 



5 

 10 

 10 



Atmospheres. 



6 



6 

 5 (7|) 

 6-8 

 6-8 



Per cent. 

 40.9 

 42.37 

 45.2 

 45.28 

 48.6 



Per cent. 



Per cent. 



Per cent. 



40 

 40.3 



17.1 



18.8 



5.69 

 10.8 















Miiller, Hugo: Die Pflanzenfaser, Leipz. (1873), 150. 

 1 Analyses by Griffin and Little. 



