Scientific American, 39r May 12, 1906. … by a foot lever and raised by its molds, 36 different full- Fig. 6.—A Dwelling Built of Concrete Blocks at a Cost of Only $4,000. the returning follower. The size and 288 fractional blocks. four sides of the mold are released by levers, and the Its core holes may be raised from 2 to 6 inches, and…
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