88 AUTOBIOGRAPHY OF JOHN FRITZ
watched the tuyeres with much interest and when the cinder began to bubble there, we all knew that the crisis had arrived, and all went to the front to see the result of our long, anxious, and interesting investigations. The keeper cut a smaU gutter in the loam from the t3anp to the dam plate, some three or four inches in depth, in order to guide the cinder to the notch in the dam plate. The place selected to drive the bar for cinder was some four inches below the tjrmp and about twelve inches below the tuyeres. The keeper placed the bar as directed by Mr. Collins and it was driven in some fifteen inches without any difficulty. When the bar was withdrawn the cinder flowed out rather slowly but it was sufficient to guarantee success, as we weU knew that the next flush of cinder would be hotter. It was, and the result was entirely satisfactory. Taking into con¬ sideration the condition of furnace practice at that time, this was a marked improvement, making in all respects a closed front. Some years later Mr. Liirmann, of Ger¬ many, made an improvement on what we had done by the introduction of the water cinder notch, patented it, and it is now in general use.
After being in Mr. Reeves' employ some twelve months, doing aU that I was caUed upon to do and getting the practical furnace experience I so much desired, I concluded, as Mr. Hooven wanted me to go back to Norristown, to do so, and I told both Mr. Reeves and Mr. Collins of my intention to leave them and return to Mr. Hooven at Norris¬ town. They both objected, saying they did not want me to leave them. In reply I said to them that the furnace was going smootlfly, and there was but Uttle for me to do, and that I would be much more useful to Mr. Hooven than I could be to them, and besides I would be near by in case they had any trouble. " I could be with you," I said, "with¬ in an hour's time." They both were satisfied with this