APPENDIX II 
Specifications for a coal purification and briqueting plant 
The detailed specifications for a combined coal purification and 
briquetting plant especially designed to deal with Brazilian coal, as 
planned by the Humboldt ingineering Works of Kalk, Germany, 
based upon practical experiments with a carload of the coal from both 
Santa Catharina and Rio Grande do Sul, are as follows: 
Kalk, near Cologne, 25th november, 1905. 
I. C. White, Esquire, Chief of the Brazilian Coal Commission, 
Rio de Janeiro. 
Dear Sir 
With reference to your visit here and the tests carried out for 
you at our Works, we have pleasure in handing you herewith plan, 
specification, tender and description of coal crushing and washing 
plan of 30 tons. per hour capacity and briquetting plant for same of 10 
tons. per hour capacity. 
We have taken this output of the washery (300 tons. per day of 10 
hours) becausea smaller plan (for say 100 or 200 tons) would not be 
appreciably cheaper and would therefore be irrational. 
It were also irrational when building the plant, to immediately 
reckon with an extension of same later on, as certain apparatus would 
then have to be made too large in proportion and the building itself 
made very large. 
We consider it better in cases such as this, where one has unli- 
mited space at one’s disposal to later on duplicate the plant, this at the 
same time halving the risk of breakdown, In this way it is also 
easy to regulate matters to suit the supply and demand. 
As regards erection of the plant, we may say that the wages, etc., 
of the erectors and labour hands are not included in our tender. To set 
the plant going we would b? prepared to place at your disposal one of 
