WILLIAM SIE^fEKS, F.R.S. 



I . I'he heating surface provided for superheating the steam or 

 air under compression, must be increased proportionately to the 

 force to be obtained, and to the necessary loss by cushioning. 



In the employment of these engines the practical difficulty 

 consisted in properly and safely superheating the steam ; but 

 several, not exceeding 10-horse power, have been working 

 economically and for some time, and my reason for not pursuing 

 the subject further, has been the progress made since, in using 

 steam expansively, with due care to prevent loss by condensation, 

 by which means nearly the same economical results could be realised 

 with less risk of stoppages for repairs. 



Yours faithfully, 



C. WILLIAM SIEMENS. 



12, QUEEN ANNE'S GATE, S.W., 13^ April, 1875. 



AT THE ANNUAL MEETING OF THE IRON AND STEEL INSTITUTE, 

 field on May 5, 1875, it was announced that the Council had 

 awarded the BESSEMER MEDAL FOR 1875 to DR. SIEMENS, 

 F.R.S., &c., in recognition of the valuable services he has 

 rendered to the Iron and Steel Trades by his important 

 inventions and investigations. 



MR. BELL* (the President) proceeded to congratulate Dr. 

 Siemens, Fellow of the Koyal Society, upon the medal, which he 

 was about to place in his hands, having been awarded to him. 

 He (the President) was glad to hear, during the reading of the 

 report, judging from the applause with which the announcement 

 was received, that the manner in which that portion of the 

 Council's duties had been discharged met, he might say, with 

 unanimous acceptance. He had only to congratulate his friend 

 Dr. Siemens, and to present to him the Bessemer medal for 1875. 

 (Dr. Siemens here stepped upon the platform, and received the 

 medal.) 



* Excerpt Journal of the Iron and Steel Institute, 1875, pp. 11-12. 



