2 THE SCIENTIFIC PAPERS OF 



The ejection pipe at the base of the condenser is furnished 

 with an air vessel for the purpose of obtaining a greater force 

 during the time the vacuum is greatest. 



The whole condenser bears but a small proportion to the size of 

 the cylinder, and there would frequently be room for it within the 

 cylinder. 



By Mr. Siemens's condenser, about 6 times the quantity of 

 water to condense the steam, about 20 are required by the ordinary 

 process. 



The principal application of this condenser is looked for in 

 high-pressure engines. One of his condensers at work on 16 

 horse-power engine made by Cappel. 



In low-pressure engines there would not be power to force it 

 into the atmosphere. In this engine three condensations take 

 place : one at 180, this condenses the steam 200, and the 

 remaining \ in. is steam first cooled by jet ; two, by contact sur- 

 faces ; and third, condensed at its maximum pressure. 



Mr. Grampian sees nothing opposed to the condenser but the 

 cleaning, and that may easily be managed by simply having a 

 duplicate set of plates. 



Mr. Glynn quite convinced that the principle involved is one 

 likely to be highly useful. 



Resolved: It is the opinion of this Committee that Mr. 

 Siemens's Regenerative Condenser is new, highly ingenious, and 

 appears to be highly valuable in its application to steam engines, 

 and is therefore well entitled to the Society's reward of their Gold 

 Medal. 



Signed, C. VARLEY. 



T. E,. CRAMPTON. 



