Santa Cruz, June 8. We extrude plastic sausage casings, wire, garden hose, aluminum shapes, and many other items, but the Ecotopians extrude whole rooms. They have devised machinery that produces oval-cross-section tubing, about 13 feet wide and 10 feet high; the walls are six inches thick, and there is a flat floor inside. The tubing can be made solid, or windows can be punched out along the sides. It can be bought with ends cut off square or on the diagonal. The resulting houses take many shapes—in fact I’ve never seen two that were alike—but you can get the general impression by imagining
  
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