Show 0 f I About two years ago the novalofilccrs and shipbuilders IVQIC consjderihfr the I advisability of sheathing the Ironclads f with copper to protect the ship against the barnacles that they pick up on along a-long voyage About a year ago it was Bald that a process had been discovered discov-ered to infuse copper into or upon the bottoms of ships by electricity Now the Scientific American saya that two new British vessels sheathed with copper cop-per have suffered so much from the corrosion of their steel plates from galvanic I I I gal-vanic action that they leak badly The j I i i bolts are first attacked and destroyed j I I and the decision Is that marine growths are less troublesome than leaky Bottoms I Bot-toms Coppersheathed < wooden ships could keep clean at sea a long time j I I and It was the success of the sheath I Ing on such nhips I that led to the agl l I 0 tatlon In favor of employing copper on nteel structures But It has been abun I I dantly shown in recent years that gal vunlc action is very destructive and Is to be avoided If possible In all atruc I tures Intended to be permanent I |