Word: glasse
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Dates: during 1890-1899
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Professor Trowbridge's experiments with the cathode rays at the Jefferson Physical Laboratory have shown that the quality of glass constituting the Crookes tubes has very little to do with the phenomena outside the tubes. A bulb that gives a blue fluorescence will produce as good cathode photographs as one that produces a yellow or green fluorescence. It is practically useless to endeavor to obtain photographs with tubes which are not exhausted to a high degree, perhaps one millionth of an atmosphere. When the anode throws a strong shadow of the cathode on the fluorescent walls of the tube...
...last evening. Several views of the cathedrals at Chatres, Amiens, and Rheims were shown and their peculiarities described. One damaging alteration in the Gothic architecture during the 14th century, said Processor Moore, was the introduction of private chapels into the cathedrals. The original outer walls with their rich stained-glass windows were destroyed and other walls erected which included the buttresses within the building...
Their time is poor and they shoot slowly, while their recover is apt to be too fast. They are also rowing at present in rather a listless way. A rather novel feature which is used by all the class crews is a large looking-glass, which makes it easier for the men to realize their faults...
This new form of ray lamp is that of a cone, and its characteristic difference from the ordinary Crooke's tube is that the sides or walls of the lamp are made of sheet aluminum 1/10 in. thickness; the base of the lamp is made of solid glass, practically a plug fitted into the base of the aluminum cone with paster-of-Paris, and made air tight. A metallic ring passes around the base of the cone and holds the sides of the cone firmly to the glass bottom. Through a point a little to the side of the centre...
...form of ray lamp has an interest aside from its construction, from the fact that experiments conducted with it appear to disprove the theory that a glass vacuum envelope plays a significant part in the generation of Rontgen rays. This theory, which was advanced by Dr. Rontgen himself, has been strongly supported by Poincare and provisionally accepted by other authorities. Yet Mr. Woodward has obtained excellent shadowgraphs from the radiations passing through the sides of the aluminum cone of his lamp. This supports another theory that has been offered, to the effect that Rontgen and cathode rays are independently generated...