Show GOO V 09 ak ROAD itzi FIND ASPHALT BY ACCIDENT discovered in switzerland land and used of extracting i for purpose able abl it t A Aspli alt though covering thousands thou sandi ft T ot of miles of roads in nil all countries was wag disco discovered ered quite by accident in the f middle of the last century it was wag found in switzerland in its natural state and used for the purpose of extracting tr the valuable store of bitumen it contained in time it was noticed that tant pieces of rock which fell from the wagons and were crushed by the n heels formed a very fine road surface when half melted by the heat of the sun an experiment was made lind and a rond rand ol of asphalt laid in paris it was so successful that the new road material became adopted through all the big towns of europe all sorts of materials have been t tried i led since from rubber to seaweed it Is ery cry likely in fact that in the future the streets of our I 1 big cities will be paved with some for form in of rubber mixture which will be practically noiseless very extensive experiments have already been carried out with such a mixture in new kew york vork several streets are raved paved with steel and a ste sli rl road has haa been in use in valencia in spain for the last W 0 years perhaps the anost curious material for a load is seaweed this compressed into solid blocks Is used to pave the streets 0 of f baltimore these seaweed blocks are bound with wire and dipped clipped into boll ing tar before being put to use |