Sir George Paget Thomson (1892-1975) was British physicist who won the 1937 Nobel Prize for his experimental discovery of the diffraction of electrons by crystals. This glass slide—two electron diffraction images of aluminum taken by Thomson and his student Alexander Reid—is a copy, made at the Smithsonian, of an original borrowed from Thomson, for an exhibit on “35 Years With Electrons As Waves.”
Ref: George Paget Thomson, “Early Work in Election Diffraction,” American Journal of Physics 29 (1961): 1-15.
Glass lantern slide with three images in rectangular wooden frame. The image at left shows 4 objects in orbit (perhaps the moons of Jupiter). The middle one represents Jupiter. That at right represents Saturn.