โ Scribed by C.
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135 various nlakers were made, under the direction of tile Geological Survey of Pe,msylvania, in a snmll shaft furnace, in which it is claimed a heat sufiieient to melt steel was maintained. [7nfbrtunately, the experiments were too much restricted, both in time and number, to give reliable results; but, though limited, they are a wlluable contribution to our knowledge of fire-brick, as f~lr as their action in tile presence of ineandeseeut fuel only is eom,erued. Although the tests did not not ill any (.ase last longer than two hours, all tile bricks experimented upon were cut or ('racked, some stan(lin~ mm'h better than others.
Tile ueeessi U of a better material tbr metallurgical processes is surely no less important now than in 1875-76, and this paper has been prepared more to revive interest ill the subject than to llresent any novel stateme it, or to enter into an i,,vestigati(m ,,f the proper (dlemieal and physical composition of fire-bride The manutlteturers of fire-brick have shown a commendable desire to meet the (hmmnds of metallurgists as to shape and form, and considerable attcntlou has 1)een tlestowed upon eoml)osition; but most of these experiments haw~ been limited /)y individual enterprise and capital. A thorough investigation of the physical and e, hemical features (d' fire-brick, in connection with a e, msideration of the circumstances under which they are to do duty, will undoubtedly pr,)w~ of immense wtluc to practical metallurgy.
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