Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by process]
7. image-making equipment
8. photographic equipment
9. photograph viewing equipment
10. stereoscopes

Anotations

Scope note:

Viewers for full-plate Daguerreotype stereo pairs, designed and patented by Southworth & Hawes, ca. 1853. A large cabinet mounted on a cast-iron base could display ten stereo pairs in succession by means of a crank.