Engraving (scale 1"16) of J.G. Bodmer's patent 1834-43 travelling furnace grate for boilers
Engraving (scale 1"16) of J.G. Bodmer's patent 1834-43 travelling furnace grate for boilers, in frame 27" x 16"
Engraving (scale 1"16) of J.G. Bodmer's patent 1834-43 travelling furnace grate for boilers, in frame 27" x 16"