General view of two technicians using a RCA Model EMU electron microscope in the Dow Chemical Company's Metallurgical Laboratory. Electron microscopes use a beam of accelerated electrons as a source of illumination and have a higher resolving power that, in contrast to light microscopes, can reveal the structure of smaller objects.
Notably, the Model EMU debuted in 1944 and was the first American-manufactured RCA electron microscope capable of both imaging and electron diffraction.
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Dow Chemical Company. “RCA Model EMU Electron Microscope in Dow Chemical Company Laboratory,” 1952. Dow Chemical Company Historical Image Collection, Box Oversized Plants 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/cj82k737m.
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