Word: hydrogen
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...PHYSICAL COLLOQUIUM. "Radio-active Change," Mr. Hodge; "The Secondary Spectrum of Hydrogen," Dr. Lyman. Jefferson Physical Laboratory, Room...
Physical Colloquium. Some Recent Experiments on Sound. Professor Sabine.--The Liquefaction of Hydrogen and Helium. Dr. Morse. Jefferson Physical Laboratory, Room...
Among the more important results of the investigations of the past year is the discovery of two new variables, three stars having peculiar spectra and the presence of hydrogen lines in the spectrum of V. Andromeda. The discovery of the variability of light of Eros has added greatly to the value of the early Photographs of that body. Photographs of the spectrum of lightning were obtained last summer for the first time. It is expected that the discovery will open a new field for spectroscopic work...
...atmosphere of the sun. The experiment was performed by Professor Trowbridge and consisted in a careful study of the effect of powerful discharges of electricity on the spectra of various gases. Although great care was taken in drying and pur fying these gases, it was found that hydrogen, nitrogen and rarefied air gave substantially the same spectrum under the same conditions and as a result of the powerful electrical discharges the aqueous vapor was released from the walls of the spectrum tubes. From this investigation it was concluded that oxygen does exist in the atmosphere...
...voltage of 20,000, or forty times as great as the voltage required to run an electric car. This is probably the most powerful storage battery in the world. Professor Trowbridge employs it in the experiments which he is now conducting to determine the spectrum of hydrogen. It is also used in X-ray experiments, the first use of a storage battery for this purpose...