indeed, and free from the objectiona- he built up a blast furnace 50 feet high and 17 feet in diam- ble features of other known methods, since the work of the lyzes, as though it were a gigantic valve, any injurious ef- eter at the boshes. In 1867 a model of the above named bottom of the furnace… … without any difficulty what- that, there is this further ever while the work is go- facility, namely, that no- BUTTGENBACH'S IMPROVED BLAST FURNACE. Fig. 1. ing on, so that there is no thing hinders one from tap- occasion to apprehend any extinction of the fires so long as ping the melted ore at…
