  EXPERIMENTS ON THE COLORED FILMS THE AMERICAN ELECTRIC TELEGRAPH. INTERESTING EXPERIMENT WITH STRYCHNIA. THE NATURAL COLORS IN PHOTOGRAPHY. SUBMARINE TELEGRAPH BETWEEN ENGLAND AND FRANCE. ACTION OF SOLUTIONS OF CHLORIDES AND AIR ON MERCURY. GALVANIZING DAGUERREOTYPE PLATES. DAGUERREIAN ARTISTS' REGISTER. VOL. II. JUNE 1, 1851. NO. 2. THE |
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