![[Chemigraph halftone illustrations of the World's Columbian Exposition in Portfolio of views]](https://bpldcassets.blob.core.windows.net/derivatives/metadata/commonwealth-oai:kd17d153s/image_access_800.jpg)
Arnold, C. D. (Charles Dudley), b. 1844 · 1893
Includes "36 'Chemigraph' half-tone (duo-tones) illustrations from photographs of the Exposition grounds. Plates by the National Chemigraph Co., Chemigraph patented March 21, 1893."--Hanson Collection catalog, p. 116
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