362 THE SCIENTIFIC PAPERS OF 



President concluded), that members will approve the action of the 

 Council in giving our annual award of the Bessemer Medal to 

 Professor Tunner. I have great pleasure, Mr. Bell, in presenting 

 this medal to you, as representing Professor Tunner on this 

 occasion, and I hope you will convey to him the high appreciation 

 in which he and his works are held amongst us. 



In the discussion of the Paper 



"ON THE SEPARATION OF PHOSPHORUS 

 FROM PIG IRON," 



By J. LOWTHIAN BELL, M.P., F.R.S., &c., 



THE PRESIDENT* (MR. C. W. SIEMENS) remarked that Mr. 

 Bell had contributed some valuable facts on a subject which 

 interested many members. 



Mr. Bell had found that he could, by treating Cleveland pig 

 metal in a rotating furnace (such as was to be seen at the Clarence 

 Works), reduce the phosphorus to the extent of from T 3 oths to 

 -rijths per cent. ; but other results had been given, showing that 

 the phosphorus had been reduced below T Vth per cent., while the 

 slag produced gave- 6 and a fraction per cent, of phosphoric acid. 

 These figures relating to phosphorus in the slag and in the metal, 

 agreed well with the results which he himself had found in treat- 

 ing the subject in another way. At Towcester, in the rotary 

 furnace, according to figures given by him at the Newcastle meet- 

 ing, the slag was generally found to contain from 6 to 7, and 

 sometimes 8 per cent, of phosphoric acid ; but the metal produced 

 in that process had been brought to a very low percentage indeed. 

 So far, therefore, we might consider it an accomplished fact that, 

 whether they dealt with pig iron or with ores containing a large 

 percentage of phosphorus, that phosphorus could be eliminated to 



* Excerpt Journal of the Iron and Sttel Institute, 1878., pp. 41-44. 



