Miracle concrete: the great modern industry (1909)
Miracle Pressed Stone Co. · Miracle Pressed Stone Co. · leaf 17
Rock Face Interior, 9-inch Wall.Face Plate H-175X, H-175.Price $10.00. ANOTHER REASON FOR STRENGTH. The Miracle Block gains in strength over most singleair space blocks in the following particulars: The distance between connections of solid concrete isless. See illustrations on this page. In… … Block there is only 4 inches between connections, whichare staggered, therefore strengthen any possible weaknesscaused by an air space. In addition to this there are three solid walls of con-crete firmly connected at alternate points by short two-inchspans of concrete, while the single air space…
