122 The Philippine Journal of Science im 



pig iron for use in the foundries in the Philippines, due to the 

 high percentage of sulphur which it contains. 



Cox " has shown that there are many woods in the Islands 

 from which the charcoal obtained is entirely free from sulphur 

 and is suitable for use in the smelter. Certain features shown in 

 the analysis of the ash, such as the high percentages of calcium 

 and sodium oxides, may be possibly explained by the fact that 

 the mangroves are distinctly salt-water species occurring in 

 tidelands. The high calorific value places bacauan charcoal 

 as a high-grade fuel for all domestic purposes, and for such 

 purposes there is a great demand for charcoal in the Philippines. 



Coconut-shell charcoal possesses remarkable absorptive prop- 

 erties. Such charcoal was used by Wright and Smith 12 for filling 

 the absorption tubes used in their quantitative determinations 

 of radium emanation. 



The matter of first cost and operation expenditures is one of 

 individual calculation, depending upon certain local conditions. 13 



The production costs, costs of installation, and production 

 values received in the United States in the distillation of hard- 

 woods have been discussed in some detail. 1 * 



French 15 finds the production cost to be approximately 17.70 

 pesos and the production value of crude products 19.82 pesos, 

 giving a profit of 2.12 pesos per cord. He places the cost of 

 installation, eliminating the cost of wood supply, at 4,000 pesos 

 per cord per day production. These figures are for a plant 

 producing crude products from hardwoods. 



In determining whether a plant may prove profitable or not, 

 many factors must be taken into consideration. 



Through the courtesy of a manufacturer of wood-distillation 

 plants 16 this Bureau has been furnished with a few of the 

 leading questions that should be considered as important factors 

 in plans for a wood-distillation industry. 



1. How much wood, and of what quality, is to be worked per year, and 

 in how many working days? What is the price of sufficiently split wood 

 at the place where the factory is situated? 



"Cox, A. J., Philippine firewood, This Journal, Sec. A (1911), 6, 10. 

 "Wright, J. R., and Smith, O. F., This Journal, Sec. A (1914), 9, 54. 

 "Klar, loc. cit. 



"French, E. H., Journ. Ind. & Eng. Chem. (1915), 7, 55. 

 " One peso Philippine currency equals 100 centavos, equals 50 cents 

 United States currency. 



" Mr. F. H. Meyer, Hannover-Hainholz. 



