However, the two remaining articles are both written so as to be quite intelligible to bio-medical microscopists, and quite germane to their interests. Professor Ruska-one of the grandest of the grand old men of electron microscopy-has lucidly reviewed "Past and present attempts to attain the resolution limit of transmission electron microscope." The electron micrographs demonstrating 4 AO poin...

Two experiments were conducted to investigate the geometrical structures of photographic and stereoscopic spaces. In Experiment 1, it was investigated how accurately photographic space reproduces real physical space, and the geometrical structure of photographic space was compared with that of visual space. As a result, the mapping function of distance between photographic and physical spaces (...