Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 767
A PIECE OF PITCH-BLENDE, THE MINERAL FROM WHICHRADIUM IS OBTAINED. PHOTOGRAPH MADE BY THE RAYS FROM THE PIECE OF PITCH-BLENDEPICTURED AT THE BOTTOM OF THE PRECEDING COLUMN. But a piece of radium, in addition to givingoff these peculiar rays, sends out such a showerof little particles that it is…
Children's literature
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