Improved electron microscope

Electron microscopes were improved to greatly outperform optical microscopes, the best of which peaked at a magnification of 2000x. Hillier's initial improvements led to 7000x and eventually magnifications of two million times.
 James Hillier Canada 1937 Improved electron microscope

Electron microscopes were improved to greatly outperform optical microscopes, the best of which peaked at a magnification of 2000x. Hillier's initial improvements led to 7000x and eventually magnifications of two million times.