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A NEW ELECTRONIC SUN! The famous RCA Electron Microscope has a new attachment—a diffraction camera, so that man's eye can see the enormously magnified structure of an infinitesimal object and actually determine its atomic design. The atoms are not seen but the new adapter finds out where they are. The revealing picture looks like the midnight sun. But in reality this is not a picture of anything. It is the spirit of the crystal structure—an assembly of complex clues from which the mathematical detective can deter- mine how the atoms take their orderly arrange- ments in various substances. Scientists call the picture a diffraction pat- tern—a pattern from electrons, which found their way through the crystal lattice — that invis- ible, exquisite arrangement of atoms which nature fashions from humble table salt to the lordly diamond. It is a set of concentric circles, some diffuse, others sharp. From the dimensions of the circles and the intensities, the arrangement of the atoms in the material is determined, so that the crystal structure can be identified and analyzed. Thus, RCA Laboratories open new and unseen worlds for exploration as the Electron Microscope coupled with the new diffraction camera sees deeply into electronic and submicro- scopic realms. BUY U. S. WAR BONDS EVERY PAYDAYI RCA LABORATORIES PIONEER IN RADIO, ELECTRONICS, TELEVISION A Service of the Radio Corporation of America • RCA Building, New York, N. Y. Other Services of RCA: RCA Manufacturing Company. Inc. • National Broadcasting Company. Inc. R. C. A. Communications, Inc. • Blue Network Company, Inc. • Radiomarine Corporation of America • RCA Institutes, Inc.