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THE POPULAR SCIENCE MONTHLY. 



steam-cylinder containing a piston similar to those of HJuyg hens' 1 s and 

 PapirCs engines, and driving a separate pump, similar to those gen- 

 erally in use where water was raised by horse or wind power. 



Dr. Hooke advised and argued strongly against their plan ; but, 

 fortunately, the obstinate belief of the unlearned mechanics was not 



Fig. 10. The Newcomen Engine, as improved by Smeaton, 1775. 



overpowered by the disquisitions of their distinguished correspondent, 

 and Newcomen and Cawley attempted an engine on their peculiar 

 plan. 



This succeeded so well as to induce them to continue their labors, 

 and in 1705 to patent ' in combination with Savery, who held the 

 right of surface condensation, and who induced them to allow him an 

 interest with them an engine combining a steam-cylinder and piston, 

 surface condensation, and a separate boiler and separate pumps. 



J It has been denied that a patent was issued ; but there is no doubt that Savery 

 claimed and received an interest in the new engine. 



