Show OR SOLID BRICES some experiments have lately been made mode on the tho comparative sustaining power of or patent perforated bricks and bricks of the tile ordinary kind in each casa case a pier of four courses of the bricks to be tested was built in roman cement oil on the table of a powerful hydra hydraulic ulin press and allowed at least twenty four hours thoroughly to set A light scale board was suspended to the safety vale lever of the press on which there were placed successive weights until the pier of bricks on the table of the press was crushed the number of weights was wag increased a quarter of a pound at a time being equivalent to an increment of 10 tons the press commencing at 31 3 tons this starting point being the effect due to the united weights of the t ie lever and scale scalo board the p pumps were worked very slowly to eliminate the twe concussion on russion produced otherwise by the tile inertia of the tile water the first elpe rini nt tit was made with good ordinary brick it in a pier IS 18 inches square built in four courses this tills showed symptoms of failing wih tons and was crushed with A pir pier of tile sim dimensions of perforated bricks beglin began to crack with tons and was crushed with tons et ev |