Roper's Questions and Answers for Stationary and Marine Engineers and Electricians, with a Chapter on What to Do in Case of Accidents
Roper's Instructions and Suggestions for Engineers and Firemen who Wish to Take Charge of Any Class of Steam Engines Or Boilers, Stationary, Locomotive Or Marine
Roper's Instructions and Suggestions for Engineers and Firemen who Wish to Take Charge of Any Class of Steam Engines Or Boilers, Stationary, Locomotive Or Marine