... I XLOCHIUE PUDDLING. TO THE ErDITO1: O TrlE NOfTiEIMN ECHO. Sia,-In the abstract of Ir Smith Casson's papor given in your issue of the 3rd iust., it is stated that a plant of ten Casson Dormuoy furnaces will shortly be started at the Wigan Rollingu Mills, anud three by Messrs Morewoods, of Birmingham. As makers of the machines (under Clough's and Clough and Rideulgh's Patent)jfor ...