Four hundred years ago Belgian physician Johann Baptist Van Helmont was persecuted by the Roman Catholic Church for promoting the use of the 鈥淧owder of Sympathy鈥� that was supposed to treat wounds...
Snow-making machines actually make tiny beads of ice, each one about one ten-thousandth of an inch in diameter.聽Water is sprayed from a hose together with compressed air.聽The air is needed because...
Four hundred years ago Belgian physician Johann Baptist Van Helmont was persecuted by the Roman Catholic Church for promoting the use of the "Powder of Sympathy", a concoction that was supposed to...
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