...proposed. In order to start our present furnace, we shut the lower iron door and lower the pencils to the bottom of the furnace. The current is turned on and the mixture of coke and lime fed in, the arc being kept covered with the mixture as high as one foot around...

...OI the furnace. The side edges are turned back to form grooves for a slide made of sheet metal. The slide is curved, to conform to the furnace, and the...making the reduction in temperature quite noticeable. When the furnace is to be used for heating, the opening is covered by the slide, or it may be employed...