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Will he make gold?, 1932. Creator: UnknownWill he make gold?, 1932. Fabriquera-t-il de l or?. Engineer Zbigniew Dunikowski claimed to be in possession of a secret formula which allowed him to obtain gold from ordinary sand and rocks
L Ecole Centrale des Arts et Manufactures, Paris, 1887. First year students doing practical work in the laboratory
Students at l Ecole Centrale des Arts et Manufactures, Paris, 1887. First year students working in their private study time
