Electric Cooking at Paris Exposition. I Weight of Elephants' Tusks. PENETRATIVE QUALITY OF LIGHT AS TESTED BY PHOTOGRAPHY. BY J. W. HYDE NEGATIVE MADE BY RAYS OF LIGHT PASSED THROUGH THE HUMAN BODY. PRINTS FROM NEGATIVE AND POSITIVE TAKEN BY RAYS PASSED THROUGH THE HAND. MoldavIte. STUDI SHOWING METHOD OF MAKING NEGATIVES, scientific american, 1900-09-29

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Electric Cooking at Paris Exposition. I Weight of Elephants' Tusks. PENETRATIVE QUALITY OF LIGHT AS TESTED BY PHOTOGRAPHY. BY J. W. HYDE NEGATIVE MADE BY RAYS OF LIGHT PASSED THROUGH THE HUMAN BODY. PRINTS FROM NEGATIVE AND POSITIVE TAKEN BY RAYS PASSED THROUGH THE HAND. MoldavIte. STUDI SHOWING METHOD OF MAKING NEGATIVES, scientific american, 1900-09-29

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