https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!11005~!0#focus ...
[Exhibited under heading: "Heliotypes" and under the sub-heading: "From James R. Osgood & Co., Boston, Owners of the American Patents. Frame 2.--Copies of Engravings in the Gray Collection, Cambridge.
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback