150 AUTOBIOGRAPHY OF JOHN FRITZ
At this time the making of Bessemer steel was a most important and interesting subject, and so far seemed to be surrounded with doubts and difficulties that looked formidable.
Having taken an interest in the process from its early inception, and closely watching the progress it made in England and Sweden, I made up my mind it was an inven¬ tion of such importance to us that I would investigate it. After the patent rights for the United States had been bought by Winslow, Griswold & HoUey, I made a visit to Troy, N. Y., where they had an experimental plant, to try to get the right to use the patents for a small two-and-one- half- or three-ton converter, for experimental purposes, at Betlflehem with American pig iron, to see whether our ores were suitable for acid Bessemer steel. My interview with Mr. Griswold was very unsatisfactory. After seeing Iflm and talking the subject over thoroughly with him, he showed me a circular from Mr. Bessemer in which he said the Umit of phosphorus was 0.02 in the steel. A reference to this circular was made in the discussion of a paper read by Sir Henry Bessemer at the December, 1896, meeting of the American Society of Mechanical Engineers, of wliich at the time I had the honor of being President. (It is reported in " Transactions American Society of Mechanical Engineers," Vol. XVIII, page 482.) When I saw the Bessemer circular I at once said, " Mr. Griswold, if that is the limit of phos¬ phorus, it is useless to consider the subject any further, and the process wfll be of Uttle value in this country." We had had, practicaUy spealdng, most of the ores of the country analyzed by WiUiam T. Roepper, of Bethlehem, Pennsyl¬ vania, and had found it was not possible to make any consid¬ erable quantity of pig iron low enough in phosphorus to meet the requirements of the Bessemer circular. I weU knew it was not possible to get any large quantity of iron so low in