SPECTROMETERS FOR PHYSICAL AND CHEMICAL TESTS, ESPECIALLY FOR NUCLEAR RESONANCE, ELECTRON RESONANCE, INFRARED SPECTROMETRY, GAS CHROMATOGRAPHS; COMPUTERS AND OSCILLOSCOPES FOR USE WITH SPECTROMETERS AND GAS CHROMATOGRAPHS, MAGNETS FOR GENERATING STRONG MAGNETIC FIELDS, AND POWER SUPPLY UNITS FOR SAID MAGNETS AND SPECTROMETERS