With Knoll and Ruska leading the way, other researchers quickly joined in the development effort. In Brussels Ladislaus L. Marton made a primitive electron microscope to study the photoelectric effect, and went on to produce the first micrograph of a biological specimen. Manfred Von Ardenne in Berlin produced the earliest scanning-transmission electron microscope in 1937. At the University of Toronto in Canada, Cecil Hall, James Hillier, and Albert Prebus, working under the direction of Eli Burton, produced an advanced 1938 Toronto Model electron microscope that would later become the basis for Radio Corporation of America's Model B, the first commercial electron microscope in North America. Ruska at Siemens in Germany produced the first commercial electron microscope in the world in 1938.
by wesm12 8 months ago