DISCUSSION. THE PIER-HEAD OF THE OLD SOUTHEND PIER, AND OF THE RECENT EXTENSION OF THE STRUCTURE; WITH AN INQUIRY INTO THE NATURE AND RAVAGES OF THE TEREDO NAVALIS, AND THE MEANS HITERTO ADOPTED FOR PREVENTING ITS ATTACKS. ( INCLUDES PLATE ).

Keywords: PIERS, EXTENSIONS, PIERHEADS, TEREDO, TEREDO NAVALIS, MARINE, BORERS, METHODS, PREVENTION, ATTACK, WORMS, TIMBER, WOOD, DAMAGE, DESTRUCTION, PILES, RESISTANCE, GEOLOGY, LIMNORIA, CREOSOTE, PRESERVATION, SLEEPERS, RAILWAYS, SOUTHEND, UK