of ore, requires about 36 hours. through a hopper into the roasting furnace. This is The power for this plant is furnished by a 20 horse being, we believe, the only instance in which this num- 100 feet long and 14 feet wide, and about 9 feet high, ber has been used in a bridge of this kind. It… … which they are twenty- four Span, 840 feet; width, 100 feet; weight, 1,800 tons. connected b y hours. This NEW ELEVATED BAILWAY DBAWBBIDGE, BOSTON. the usual shaft- process expels ing and gears. the sulphur. The draw-span is provided with eight hydraulic The Consolidated Gold Mining Company has now…
