Show concrete not modern concrete is a ier i er ancient material for construction but reinforced con crete la is scarcely half balf a century centar old it is said to hae started in a happy idea that cime came to a frenchman who wanted anted N large flower pots pot a for his plants which should not be thick and clumsy lie reinforced 1 ein forced them with fill alie now noa ada adas s we see glass reinforced in the eaic way anai about ele vatro I 1 shafts I 1 colonel coignet and others developed the reinforcement of concrete for build ings at alist useful buildings like is s early as 1874 a concrete llla illa vis s built on the north shoie of long island sound but it was man 5 ears beffie beffi e the idea took I 1 here although in france belgium and germany german it was seized upon with avidity |