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abandoned action allow apparatus appears applied arrangement attached boiler bottom carried cause centre chamber close combination communication connected consists construction containing cover cylinder Dated described direction drawings effect employed engineer experiments fire fitted fixed force frame furnace give given guns heat important Improvements inch increased invention inventor iron July length less lever light lower machine machinery manner manufacture material matter means mechanical ments metal motion object obtained operation ordinary pass Patent completed piece pipe placed plates position practical present pressure produce protection pump question railway reference result rollers rope round screw secured shaft ships side similar steam steel strain strength suitable surface taken tion tons tube turned upper valve vessel weight wheel whole wire wood