"_The Bridge_ is the place where the raw materials are laid down ready to be thrown into the furnace. I conceive that it had its name (which is still continued) from this circumstance--that in the infancy of these works it was built as a bridge, hollow underneath. It was not at first known what strength was required to support the blast of a furnace bellows; and the consequence was that they were often out of repair, and frequently obliged to be built almost entirely new. "_Bellows Boards_--Not very different from the present dimensions. "_Water Troughs_--scooped out of the solid timber. This shows the great simplicity of these times, not 150 years ago. "_The Hutch_, or as it is now corruptly called the Witch, a wide covered drain below the furnace-wheel to carry off the water from it, usually arched, but here only covered with timbers to support the rubbish and earth thrown upon it. "_Cambs_ are iron cogs fixed in the shaft to work the bellows as the wheel turns round. "_Cinder Shovels_, iron shovels for taking up the cinders into the boxes, both to measure them and to fill the furnace. "_Moulding Ship_, an iron tool fixed on a wooden handle, so formed as to make the gutters in the sand for casting the pig and sow iron. "_Casting Ladles_, made hollow like a dish, with a lip to lade up the liquid iron for small castings. "_Wringers_, large long bars of iron to wring the furnace, that is to clear it of the grosser and least fluid cinder which rises on the upper surface, and would there coagulate and soon prevent the furnace from working aright. "_Constable_, a bar of very great substance and length, kept always lying by a furnace in readiness for extraordinary purposes in which uncommon strength and purchase was required. I suppose this name to have been given to this tool on account of its superior bulk and power, and in allusion to the Constable of St. Briavel's Castle, an officer heretofore of very great weight and consequence in this forest. "_Cinder Hook_, a hook of iron for drawing away the scruff or cinder which runs liquid out of the furnace over the dam plate, and soon becomes a solid substance, which must be removed to make room for fresh cinder to run out into its place. "_Plackett_, a tool contrived as a kind of trowel for smoothing and shaping the clay. "_Buckstones_, now called Buckstaves, are two thick plates of iron, about 5 or 6 feet long, fixed one on each side of the front of the furnace down to the ground to support the stone work. "_Iron Tempe_ is a plate fixed at the bottom of the front wall of the furnace over the flame between the buckstaves. "_Tuiron Plate_ is a plate of cast iron fixed before the noses of the bellows, and so shaped as to conduct the blast into the body of the furnace.