Ferro-Concrete Structures.

" FERRO-CONCRETE " is the name given, to that form or system of reinforced concrete introduced by Mr. Hennebique, of Paris, and its construction differs only in detail from the numerous other systems of reinforced concrete in use in England and abroad. Mr. Hennebique, however, appears to be the only inventor who has succeeded in driving or sinking concrete piles in a satisfactory manner.

The method of construction of ferro-concrete is no doubt familiar to all engineers, and I propose in this Note merely to draw attention to certain points in connection with its manufacture which should be specially attended to.