Collins, A. Frederick (Archie Frederick), 1869- · Boston, Small, Maynard and company · leaf 34
ibleshaft. The small ones run at the enormouslyhigh speed of 30,000 revolutions per minute andthis is slowed down to working speeds by meansof what are called reduction gears. It is shownin Fig. 11. A year after De Laval got out his single wheelturbine, Charles A. Parsons, of England, com-bined the… … Fig. 11. De Lavals, the First Practical Turbine minute and its success led to the building ofsteam turbines powerful enough to drive the
Steam-engines
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-1041-540.webp)
