Balloon Is Mold for a Concrete Bomb Shelter

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Bomb shelters formed by pouring wet concrete over a balloon are proposed by a Pittsburgh artist, John H. Fraser. As a demonstration in model form, he poured the mixture over a deflated rubber balloon and then inflated it, the blown-up balloon forming an “igloo” mold.

Title (Dublin Core): Balloon Is Mold for a Concrete Bomb Shelter