UTAH ACADEMY OF SCIENCES 125 
All the ore is hoisted through the Richman shaft by a 
two ton self dumping skip, where it passes over the picking 
belt. The ore first passes over a grizzly and then through a 
blake crusher set to 4 inches. It is then elevated to the 
picking belt by a belt conveyor. The picking belt consists 
of a 24 inch belt conveyor moving about 30 feet per minute. 
There are from five to ten Mexicans on each side of the 
belt who pick out the waste which is subsequently trammed 
to the dump. The sorted ore drops from the picking belt 
to a cross conveyor belt which delivers it to the bin at the 
top of the gravity tramway. The gravity tram is about 800 
feet long, and by means of two two-ton skips on a three 
rail system, the ore is delivered to the smelter bins at a cost 
of from 2 to 3 cents per ton. 
The mine ore sample is taken by an automatic sampler 
installed at the picking belt, the sample being crushed, coned, 
and quarted as usual. 
The smelting is done in a 40 inch by 120 inch copper 
matting furnace of twenty tuyers, and a drop of 9 feet. The 
furnace is jacketed with steel water jackets, and operates 
under a blast of about 11 oz. mercury. The blast is fur- 
nished by a Root Blower of 85 cu. ft. air per revolution, and 
an average speed of 84r. p.m. The blower being driven by 
a 125 H. P. Norberg Corliss engine direct connected. 
The furnace is tapped on the side under the tuyers, 
the intermittent tap being used. The matte and slag flows 
into a small fire brick settler having inside dimensions of 
6 feet 8 inches by 3 feet by 2 feet 8 inches. Slag flows from 
the settler into 5-ton pots which are pulled to the slag dump 
by a donkey hoist. Matte is tapped into moulds holding 
about 150 lbs. to the pan depending on the grade of matte. 
The matte is weighed at the end of each shift, and is then 
stored in a warehouse until a carload is ready to ship. Each 
carload averages 43 tons with the probable exception of the 
last car of each month, when the matte is all cleaned up. 
An assay for copper, gold and silver, is run on each carload 
lot. Then a copper average for the month of all lots ship- 
ped is run. 
