Word: hydrogen
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Dates: during 1890-1899
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...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...
...discovering variable stars is very successful. There is in the observatory a library, so to speak, of the sky for the past eight years. During this time nearly 60,000 photographs of the skies at differet times have been taken. As soon as a star is noticed with hydrogen lines on its spectrum, a reference is immediately made to the photpraphs made in that region where the star is found. From these different photographs it can be learned whether the star is always of the same brightness. This method leads to the discovery of more variable stars here than...
Physical Colloquium. The Critical Constants of Hydrogen. Jefferson Physical Laboratory, Room...
Physical Colloquium. The Critical Constants of Hydrogen. Jefferson Physical Laboratory, Room...
Boylston Chemical Club.Under the auspices of the Boylston Chemical Club, Dr. Bancroft will deliver a lecture this evening at 7.30 o'clock in Boylston 9, on the subject: "Nascent Hydrogen." The public are invited...