Word: blue
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Dates: during 1890-1899
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...showed, it is nothing more than a large receiver of air from which the air can be exhausted. In order to get the rays, however, you must push the exhaustion only to a certain point. Now instead of using the 10,000 cells already mentioned to produce the pale blue flame, a Ruhmkoff coil is introduced, which makes it possible to get a high electro-motive force...
...transformation of the Ruhmkoff coils in series and connecting the coils with the tube and then exhausting the air, you get the cathode rays. At this point the experiment was performed. The light in the Crooke's tube was a pale blue on the two pole and light pink in the centre. A fluorescence was given off which was of a light blueish-green color. This, Professor Trowbridge explained, was thought by some to be the cathode rays, but the point is still in doubt. No one knows what the rays are. In connection with this the lecturer took...
HARVARD SOUTHERN CLUB.- All members of the club who expect to attend the annual dinner Friday evening will please sign the blue-book at Leavitt and Pierce's at their earliest convenience...
FRENCH 1A.- Blue-books containing corrected exercises, will be returned at the close of the examination this morning...
Professor Trowbridge, director of the Jefferson Physical Laboratory obtained on Wednesday afternoon a distinct impression upon a photographic plate by means of the Professor Rontgen cathode rays acting through wood and pasteboard. The impression has been fixed and is capable of giving a print upon ordinary blue print or other sensitive paper...