Word: hydrogen
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...magnitude. The explosive outburst has therefore increased the brightness by more than 100,000 times in less than a month. The spectrum, observed at Harvard and at Flagstaff, now closely resembles the spectrum of the super-giant star, Alpha Cygni, with the addition of bright lines of hydrogen and from. Enormous velocities in the exploding atmosphere are indicated by these spectrum lines...
...frightful din, the workers rattled and poked. As predicted, the starlings fled-to the eaves and cornices of nearby buildings, where they resumed their own annoying chatter. Superintendent Lanham was not baffled. First windless night he planned to send out a squad of men armed with large, hydrogen-filled balloons on long strings. These would scare the starlings off the buildings, back into the trees. There his tin-can brigade could rout them back to the buildings. If he kept that up long enough, possibly the starlings' spirits would break...
Like the perturbations in planetary orbits that indicated the existence of a planet beyond Neptune, all this was evidence, not proof. Like the planet Pluto, heavy hydrogen had to be located. Dr. Urey knew that if its atoms had indeed a mass of two units, it would show spectrum lines of a predictable kind and position. The question was how to get the substance in sufficient concentration to show spectrum lines at all. It occurred to him that if liquid hydrogen were allowed to evaporate, the lighter atoms would pass off first, leaving the heavy ones in greater abundance. Hydrogen...
...fish, tadpoles and flatworms die in it, but mice fed with it seem to get tipsy. It has been found in slightly higher than normal concentration (one part in 4,500) in the Dead Sea, the Great Salt Lake, the sap and wood of willow trees, borax deposits. The hydrogen of honey, coal benzene and kerosene was found comparatively rich in D. But in the Sun's atmosphere only one atom of D in 100,000 of hydrogen appears to be present...
...chemists, according to Dr. Urey, the greatest importance of heavy hydrogen is that exchange reactions involving hydrogen can be traced, since the heavy and light atoms are as distinct as red and green. To physicists, the heavy nucleus, the deuton, has proved an invaluable atom-smashing projectile. To commercial chemists, interaction experiments between hydrogen and heavy hydrogen at low temperatures have offered hope that the cost of synthesizing alcohols and ammonia may be drastically reduced...