text:  Invaluable plant--pride of intelligent agriculture--that tendest thine own fibre--and strength to him that rightly cultivates thee--and constitutest the greatest element of mechanical power! What does not England--the world itself--owe to that growth which we now contemplate! Armies are encamped within thy walls--thou towest forth the ship of discovery on her venturous way and carriest man and his merchandise to the Equator and to the Pole! Vain were the auspicious breeze unless it blew upon thy opening sails; and what were the sheet-anchor but for that cable of thine which connects it with the ship