![[Geophone] family photo](http://media.ancientfaces.com/images/photos/watermark/2/7/1232127.jpg)
Photo provided courtesy of the United States Library of Congress.
[Geophone]
[Geophone]
1 negative : glass ; 7 x 5 in.
- Title from jacket.
- Detroit Publishing Co. no. K 2362.
- Gift; State Historical Society of Colorado; 1949.
- Detroit Publishing Company
Detroit Publishing Co. , publisher
- Mining.
- Telephones.
- Dry plate negatives.
- Photographic prints--Reproductions.
Detroit Publishing Company Photograph Collection
