Stereoscopic Studies of Cells and Viruses in the Electron Microscope.

摘要

The electron microscope has two big advantages over its older cousin, light microscope. The first of these is its high resolution, 0.002 micro as prepared to a resolution of only 0.2 of micro for the light microscope. By dint of the resolution the electron microscope has already given a number indications on an almost molecular scale of how certain cellular constituents and products are arranged. The second advantage, which is less well known, is the great depth of focus of the electron microscope, which, being about ten times that of the light microscope, makes stereoscopic electron microscopy possible. However, until recently the stereoscopic determination of form has been applied only to certain rugged biological elements such as butterfly scales and diatom shells which can withstand drying.