Revision as of 00:43, 7 January 2017 by Marcin(talk | contribs)(Created page with "*15 lb per hp hr has been achieved by the 1900s - [https://books.google.com/books?id=6qovAAAAYAAJ&pg=PA808&lpg=PA808&dq=water+rate+per+horsepower+of+steam+engine&source=bl&ots...")