A Practical Manual of the Collodion Process, Giving in Detail a Method For Producing Positive and Negative Pictures on Glass and Paper. — PATENT FOR THE APPLICATION OF COLORING SUBSTANCES, OR MATTER, TO PHOTOGRAPHIC IMPRESSIONS.

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A Practical Manual of the Collodion Process, Giving in Detail a Method For Producing Positive and Negative Pictures on Glass and Paper. PATENT FOR THE APPLICATION OF COLORING SUBSTANCES, OR MATTER, TO PHOTOGRAPHIC IMPRESSIONS. · ch 20/27

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