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Fifth—From the coal of first grade both in Santa Catharina and Rio 
Grande do Sul, briquettes can be manufactured which compare favorably 
with those imported from Cardiff, Wales, being but little inferior in 
heating value to the «crown» brand, and equal to or superior to the 
«anchor» brand of Cardiff briquettes, while the second grad of coal can 
be used successfully either as a general fuel for power purposes, like 
the fine or slack coal from mines, or it can be utilized in the manu- 
facture of producer gas for gas engines. 
Steth—The coal samples sent to Kalk from the Bonito bed of Santa 
Catharina \were necessarily taken from the very much weathered crop 
coal, and Lieut. Esser’s conclusions are that iicontains so much ashy 
refuse that ils treatment would prove umprofitable in a coal purification 
plant. Itcould be utilized, however, in the manufacture of producer 
gas for gas engines, and it is probable that deeper down in the basin 
the coal would hold much less ash than the surface samples, since 
Dr. Oliveira, the first engineer of the coal commission, reports the bed 
as 5 meters thick in the boring recently made at Barro Branco Velho, 
3 meters of which, lhe says, is fairly pure coal, at a depth of only 
65 meters below the surface. 
Seventh—One of the capital dixeoveries made by the great coal 
testing plant of the U.S. Geological Survey at St. Louis is that im- 
purecoals, very high in both ash and sulphur can be utilized in the 
manufacture of producer gas for the gas engine, (the sulphur having no 
deleterious effect) and when so used coals of very inferior quality, give 
a greater efficiency in the production of power than the best grades of 
Cardiff or Pocahontas coal when utilized through the steam engine. 
That even refuseand waste production of mines, when converted into 
producer gas, yeld large returns in power. 
The test made at Sl. Louis of the Brasilian coal for producer gas 
shows that it can be successfully used for that purpose. 
These conclusions would seem torender it very probable, in view 
of the high price of imported coal everywhere in Brasil, that the coals 
of Santa Catharina and Rio Grande do Sul can be successfully marketed 
in competition with foreign coal if properly prepared )y modern 
methods of purification. 
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