Page:Popular Science Monthly Volume 12.djvu/142

130 steam-cylinder containing a piston similar to those of Hugghens's and Papin's engines, and driving a separate pump, similar to those generally 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



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.