AMERICAN STEAM ENGINEERING 289 



thus obtained is utilized in a separate cjdinder, and useful 

 work obtained from it. After a considerable amount of trial 

 and experiment on the part of Professor E. Josse, of Berlin, 

 SOo was selected as the most suitable material with which to 

 work. Liquid SO3 is therefore used to condense the exhaust 

 steam, and being vaporized in the process is capable of doing 

 useful work, either in a supplementary cylinder to the steam 

 engme, or in a separate engine. 



It is hoped that the foregoing remarks will be taken in 

 tne spirit in which they are written, namely, of friendly 

 criticism and praise — an attempt to point out the faults and 

 good points in all cases. That the engine builders of all 

 countries have succeeded in developing in their respective 

 branches and countries such magnificent machines is a fact 

 of which all engineers without national distinction should be 

 proud, 



Vol. 7—19 



