. Railroad record, and journal of commerce, banking, manufactures and statistics . e are also nonewhich has received so little scientific investi-gation or attention from those more compe-tent to make improvements in them, as thissame class of building materials. Wood,stone, iron, brick and building blocks, made ofsand and lime, have all been used, and it isstill asserted that some other material mustbe found either cheaper or more durable.—Now, while considerable attention has beenbestowed on the selection of material, littleadvance has been made in the form in whichthat material has been use
. Railroad record, and journal of commerce, banking, manufactures and statistics . e are also nonewhich has received so little scientific investi-gation or attention from those more compe-tent to make improvements in them, as thissame class of building materials. Wood,stone, iron, brick and building blocks, made ofsand and lime, have all been used, and it isstill asserted that some other material mustbe found either cheaper or more durable.—Now, while considerable attention has beenbestowed on the selection of material, littleadvance has been made in the form in whichthat material has been used. Bricks, for in-stance, of the present day, are substantiallythe same as the bricks of the pyramids ; theyare simple parallellopededons of clay madehard by the action of fire. Now the improvement, the name of whichstands at the head of this article, consists ingiving to the material a better form to secureuniform hardening in the kiln, and at thesame time to obtain the means of cementingthe wall with perfect certainty. The form ofthe brick, as shown in the accompanying cut,. in general appearance resembles the commonbrick; the back edge is hollowed in the formof a curve, and on the upper and lower sidesare dove-tail indentures also of regular , it is easy to see that when a wall is laidup with these bricks, and grouted well withgood mortar, it becomes a solid mass of greatstrength and compactness. It will also beseen, that with thesa peculiarities the bricksin the kiln are exposed more fully to the ac-tion of the fire than the ordinary brick can byany possibility be. Hence they are renderedhnrd through their entire substance. Manufacture of the Brick.—The manu-facture of the improved brick requires nogreater skill nor labor than that of the ordi-nary brick. For common mould brick, the cavities are made only on the lower side, butdeeper. Hence the ordinary mould, withpieces of wood of suitable shape placed onthe bottom, is all that is required. The clayof proper c
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Keywords: ., bookcentury1800, bookdecade1850, bookpublishercinci, bookyear1853
