Word: electronically
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...inch long. Trying to follow this minute invader as it attacks the nerve cells in the brain and spinal cord has long been a baffling problem for polio researchers. Last week two Yalemen, Drs. Joseph L. Melnick and John B. LeRoy, told how they had used the electron microscope to study this microcosmic warfare-with surprising results...
...than had been achieved before, and he needed an almost perfectly motionless base on which to stand it. The microscope was built in 1931, with various refinements added since, and is known as the Graton-Dune precision micro-camera. It gives a real magnification of 6,000 to 1. Electron microscopes, developed about the same time, give real magnifications up to 50,000 or 100,000 by using enlargements of negatives. This microscope disproved an old law concerning the limit of magnification of light instruments, and also showed that the limits of focus of a microscope are considerably smaller than...
Like stars, the point sources twinkle-in the radio sense. Two identical receivers a short distance apart do not pick them up with equal brilliance. The "twinkle" is supposed to be due to electron clouds in space that deflect the radio waves...
...tube-which eventually may be used in other color systems-comes in two types. The first has a single electron "gun" in the neck of the tube, which shoots a single beam of electrons-producing three colors: red, blue and green-onto the face of the tube. The millions of electrons are spun in front of a mask containing 117,000 minute holes, or one for every three dots on the viewing screen itself. The holes in the mask expose the incoming electrons to each of the color dots in turn, thus making a picture which approximates the color...
...move at just the right speed. If they moved too slowly, they would bounce off the curium nuclei. If they moved too fast, they would smash the more fragile nuclei. So the scientists adjusted their old reliable 60-inch cyclotron until it emitted alpha particles with 35 million electron volts of energy. This is not high power by modern standards (see above), but it did the trick. The alpha particles entered the curium nuclei and some of them stayed there, turning the curium into Element...