Source: Center of Vision, Massachusetts College of Art and Design, 1903.
What If Any Changes
Source: 1851-1878 Illustrated Catalogue and Price List of Optical, Meteorological and Mathematical Instruments Manufactured and Imported by Goldbacher, 1879.
Where to Go
Image source: Catalogue of Apparatus by Daniel Davis, 1852.
Can I Recognize New Brilliancy
Image source: Physiology of the Eye, and History of Sight-Restoring Inventions from 1851 to 1873, 1873.