Bricks
In England, the standard thickness of brick walls is a Brick and a-half, that is, the length of one brick and the breadth of another. Thirty-two paving bricks, laid flat, will form one square yard of flooring; if set on edge, sixty-four will be required for the same space. The best Bricks for walls are those termed Stocks, which are well burnt. Grizzells and Place Bricks, being only partially burnt, are soft and not durable. In various parts of the kingdom, different clays and methods of manufacture cause a disparity in the weight and appearance of the finished article. Several forms are made to suit various purposes, but the standard size is 9in. long by 4 1/2in. wide, by 2 1/2in. thick, although, since the remission of the duty, some slight variations occur, owing to shrinkage and other causes. Fire Bricks are made of a particular kind of clay, which will stand intense heat when once burnt, and are used in furnaces and other places where durability under great heat is a desideratum. Fire-clay should always be used in place of mortar in building with these.