American X-ray journal (1899) (14756826585)

Identifier: americanxrayjour5618unse (find matches)

Title: American X-ray journal

Year: 1900 (1900s)

Authors:

Subjects: X-Rays Radiography

Publisher: St. Louis : American X-Ray Publishing Co.

Contributing Library: The College of Physicians of Philadelphia Historical Medical Library

Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

Text Appearing Before Image:

ththe shot which contain the arsenic, andthose which contain the arsenic and anti-mony are distinctly fluorescent. Conse-quently I have formed the belief thata combination of arsenic and lead is dis-tinctly fluorescent, and the difference inthe proportion of the two metals whencombined creates the difference in thephenomena of fluorescence. It may bepossible that the combination of lead and which has been radiographed by itself,may be invisible pulsations in the etherof anodal origin. The direct spirting fluorescence of theshot, noticeable where they have beenradiographed by themselves, is probablydue directly to the Roentgen rays, thechild of the cathode rays, whose electri-fied atoms, or ions, have been filtered out,leaving merely the Roentgen rays.Roentgen rays are supposed not to showany perceptible refraction, or regular re-flection, or polarization. Roentgen sug-gested that Roentgen light might consistof longitudinal vibrations; others havesuggested ether streams, ether vortices

Text Appearing After Image:

FIG. 5.—LIGHT STRUCK PLATE. arsenic in varying proportions may havethe power of assimilating, and then sep-arating the various forms of rays, whichmay take place within the high vacuumtube, and the perfectly circular lumines-cence which is noticeable in the shot inthe head, and which does not extendbeyond the normal periphery of the shot,may be due to certain invisible anodalrays, and may not, like the Roentgenrays, be of cathodal origin, but theserays may be waves of light directly cir-cular in their movements, whilst thehemispherical luminescence of the shot, or even streams of minute corpuscles.Thompson says: *Invisible waves may have wavelengths that are longer than that of thered waves, or smaller than that of theviolet waves. Dr. Fonim, who has measured thewave length of the rays by interferencemethods, finds it about 1-15, the smallestwave of ultra violet light yet recorded.Many experimenters consider the raysnon-homogeneous, but a mixture of sev-eral different kinds of rays.

american x ray journal 1899 book illustrations x ray roentgen rays medical devices medicine images from internet archive

1899

Internet Archive

http://commons.wikimedia.org/

public domain