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Photography in Philately

A Krzysztof K. Słowiński Collection

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Item no. P2038 (cover)

Item no. P2038 (cover).jpg Item no. P2054a (cover)MiniaturesItem no. P2026 (cover)Item no. P2054a (cover)MiniaturesItem no. P2026 (cover)Item no. P2054a (cover)MiniaturesItem no. P2026 (cover)Item no. P2054a (cover)MiniaturesItem no. P2026 (cover)

Item no. P2038 (cover)

Type: cover

Country: USA

Date of use: 23 October 1906

Business stationery (cover) used by the company MALLINCKRODT CHEMICAL WORKS in St. Louis (Missouri, USA), a chemical factory (operating since 1867) producing various products, also chemicals for photographic purposes that were described in “Mallinckrodt Photographic Chemicals” (e.g. issue 1943). It was for some time (since 1880) a major producer of bromides for photography. Mallinckrodt published manual (several times reissued) “The Chemistry of Photography” (1931).

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