![[Collotypes of California gold mines in the Ninth annual report of the State mineralogist for the year ending December 1, 1889]](https://bpldcassets.blob.core.windows.net/derivatives/metadata/commonwealth-oai:m039kc42w/image_access_800.jpg)
Digital Commonwealth — Sterling and Francine Clark Art Institute Library
[Collotypes of California gold mines in the Ninth annual report of the State mineralogist for the year ending December 1, 1889]
California State Mining Bureau. Ninth annual report of the State mineralogist for the year ending December 1, 1889 · 1890
"21 [20] collotypes with 24 photographs of California gold mines. Phototypes by Brit[t]on & Rey, San Francisco."--Hanson Collection catalog, p. 106
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![[Carbon print and collotype in The A. B. C. guide to the making of autotype prints in permanent pigments]](https://bpldcassets.blob.core.windows.net/derivatives/metadata/commonwealth-oai:6m311w97j/image_thumbnail_300.jpg)