. The electron microscope, its development, present performance and future possibilities. Electron microscopes. 41a Magnetic Field. 41b Electrostatic Field Corrected Objective Fig. 41 At the ends, where the magnetic field goes to zero, limitation is obtained by negative potentials, which means that the poten-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gabor, Dennis, 1900-. Brooklyn, Chemical Pub. Co.

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