Piece of spiegeleisen
A piece from the batch of spiegeleisen with which R.F. Mushet carried out experiments on Bessemer steel.
Pieces of the batch of spiegeleisen with which R.F. Mushet carried out experiments on Bessemer steel
A piece from the batch of spiegeleisen with which R.F. Mushet carried out experiments on Bessemer steel.
A piece from the batch of spiegeleisen with which R.F. Mushet carried out experiments on Bessemer steel.