134 Nm Scientific Processes and Inventions . [February, 
Mr. Hollway’s operations, the most important ores of that metal 
being sulphides, and they commonly occur far away from coal- 
fields. _ .... r 
One of the merits claimed for this process is, that it is appli- 
cable to the working of very poor as well as very rich ores, or, 
as a preliminary operation, for obtaining the regulus of mixed 
ores, such as those containing copper, nickel, cobalt, silver, &c. 
This is of considerable importance, inasmuch as there are vast 
quantities of such poor ores in mountain and other regions of 
difficult access, which ores, on account of their large bulk in 
proportion to the metal they contain, will not bear the cost of 
carriage to this country for smelting. If, however, the metal 
can be brought into the state of a crude regulus, or semi-metallic 
mass, by this operation of self-supporting combustion, the 
regulus will be sufficiently valuable to bear the cost of transport 
to Swansea, or any other metallurgical centre where the fuel and 
other requisites required for its final purification are abundant. 
W. Mattieu Williams. 
