The pilos siistiiiniiig tho London bridge Kivc boen dn ven five hündrod years. In 1X45 tlu-y were critically erarained, and foui'.d to have boen decuyed but slijrlitly; these piles are principal I y oL elui. 01(1 Savoy Place in tlie city. uf London, is susfeined on piles driVeri six hundreel and iiity jeears ago ; tliey eousist of oak, elm, bceuli and cbostnut, and are perfectly sound. Tlie bridge built by the limperor Trajan over the Dauubo, affords a striking eswuple of the durability of timber m a wet state. One of these piles was taken up and föand to be petrified to t ie depth of three-fourths of aa inch, and the rest of the wood had undergone no chango, though it Las beeiv driven sixtcen hundrud yeara. Olic pdrip x$n&.