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Updated: June 18, 2025
Dicky was the "doll" with round shiny patches of red on her cheeks and a Tommy's cap and hospital blue coat. She supplied the glassy stare herself most successfully. I was "Mr. Lenard Ashwell" in aforementioned bowler, moustache, and coat. We made up the dialogue partly on the basis of the original performance, and added a lot of local colour.
In his own way Crookes focused, to begin with, his attention entirely on the light-like character of electric effects in a vacuum. It was precisely these observations, however, as continued by Lenard and others, which presently made it necessary to see in electricity nothing else than a special manifestation of inert mass.
As to the nature of the Röntgen rays, Professor Wright is inclined to regard them as a mode of motion through the ether, in longitudinal stresses; and he thinks that, while they are in many ways similar to the rays discovered by Lenard a year or so ago, they still present important characteristics of their own.
He had shown that metallic plates of very slight thickness were transparent to the cathode rays; and Professor Lenard succeeded in obtaining plates impermeable to air, but which yet allowed the pencil of cathode rays to pass through them.
Downing was gone into Holland by order of the Council of State, and this affidavit I gave to Mr. Stevens our lawyer. Thence to my office, where I got money of Mr. Hawly to pay the lawyer, and there found Mr. Lenard, one of the Clerks of the Council, and took him to the Swan and gave him his morning draft.
Lenard himself, however, with that absence of even involuntary prejudice common to all great minds, undertook to demonstrate that the opinion he at first held could no longer be accepted, and succeeded in repeating the experiment of M. Perrin on cathode rays in the air and even in vacuo.
The artifice used was suggested to Professor Lenard by an experiment of Hertz. The great physicist had, in fact, shortly before his premature death, taken up this important question of the cathode rays, and his genius left there, as elsewhere, its powerful impress.
These radiations are largely absorbed by the vapour of water, and it is no doubt owing to this absorption that they are not found in the solar spectrum. On the other hand, they easily pass through gutta-percha, india-rubber, and insulating substances in general. At the opposite end of the spectrum the knowledge of the ultra-violet regions has been greatly extended by the researches of Lenard.
Hertz, however, discovered that a small amount of phosphorescence occurred on the glass even when such opaque substances as gold-leaf or aluminium foil were interposed between the cathode and the sides of the tube. Shortly afterwards Lenard discovered that the cathode rays can be made to pass from the inside of a discharge tube to the outside air.
Lenard, a young Hungarian, pupil of the illustrious Heinrich Hertz, was the first to inflict a serious blow on the hypothesis, by showing that the cathode rays could exist outside the tube in air at ordinary pressure. Hertz had found that a thin foil of aluminium was penetrated by the rays, and Lenard made a tube having a "window" of aluminium, through which the rays darted into the open air.
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