the total number of cubic feet of brickwork in the building, and multiply by the number of brick contained in a cubic foot, allowing for wastage, etc. This is probably as accurate a method as can be followed. The larger number of masons, however, compute the superficial area of the walls, and multiply by the number of brick in the wall to one square foot of surface; the number, of course, depending upon the thickness of the wall. In the Eastern States, the following scale will be a fair average:· In the Middle and Western States, the bricks are larger, and the following scale will be more correct for that section of the country: And seven bricks additional for each half-brick added to thickness. The following table shows the number of bricks in any given wall, from 4 inches to 24 inches in thickness, and for from 1 to 1000 superficial feet. TABLE TO FIND NUMBER OF BRICKS IN A WALL Applicable to Eastern States; for Western States, reduce by one-fifteenth. APPLICATION OF TABLE. - How many bricks will there be in 9846 superficial feet of wall 16 inches thick? Answer. In 9000 square feet there are 270000 bricks. 66 800 66 66 66 66 24000 66 TABLE OF NUMBER OF BRICKS REQUIRED IN THE SETTING OF HORIZONTAL TUBULAR BOILERS. FURNISHED BY MR. ARTHUR WALWORTH, ENGINEER OF THE WALWORTH MANUFACTURING COMPANY, BOSTON. The number of bricks are for double 8-inch side and rear walls, with air space between. If one of the 8-inch side walls be omitted, deduct the number of bricks in the last column. Bricks. Bricks. Bricks. Bricks. Bricks. Bricks. Bricks in one outside wall. Feet. 6 Feet. Bricks. Bricks. Bricks. Bricks. Bricks. Bricks. Measurement of Stone Work. Stone walls are generally measured by the perch, which is 16 feet 6 inches long, 18 inches thick, and 12 inches high, and contains 24 cubic feet. It is generally reckoned, however, as 25 cubic feet. In some localities, 22 cubic feet, or 16 feet 6 inches long × 16 inches wide x 12 inches high, is called a perch, when measured in the wall. Occasionally stone work is measured by the cubic yard of 27 cubic feet. Net measurement is that where all openings through the walls are deducted, and 243 cubic feet allowed to one perch. Gross measurement is that where no openings under one perch are deducted, and 25 cubic feet allowed to one perch. When openings are deducted, it is generally agreed to allow a compensation for plumbing and squaring the jambs, and for sills and lintels. Stone walls less than 16 inches thick are reckoned as if 16 inches thick by masons, and over 16 inches thick each additional inch is counted. Rubble walls are sometimes measured by the cord of 128 cubic feet. Footing courses are always measured extra. Face work of a superior kind of rubble masonry is measured separately and described. Quoin stones of selected stones are allowed as block stone, and other dressings in a similar manner. Walling of block stone is charged at per cubic foot, according to description, similar to ashlar prepared and set, including all beds and joints; but the face is charged extra per foot superficial, according to the way in which it may be dressed. Granite, freestone, limestone, etc., used for trimming, is generally sold in rough blocks by the cubic foot. Ashlar, platforms, etc., are generally measured by the square foot; belt courses, strings, etc., by the lineal foot; the price depending upon the number of mouldings, etc. Marble, bluestone, and slate are sold by the square foot, the price varying according to the thickness. DRAIN-PIPE. There are three kinds of drain-pipe offered in the market; viz., "Salt Glazed Vitrified Clay-Pipe," "Slip Glazed Clay-Pipe," and "Cement Pipe." The name of the latter sufficiently indicates what it is without any description. The "Slip Glazed Clay-Pipe" is made of what is known as fire" (such as fire-brick) clay, which retains its porosity when subjected to the most intense heat. It is glazed with another kind of clay, known as "slip," which, when subjected to heat, melts, creating a |