15. Metallic mirror, shows no effect of regular reflection.
16. Bit of sheet-lead, 1 millimetre thick.
17. Quarter-of-a-dollar coin, silver.
18. Piece of thin ebonite, such as is used for photographic
plate-holder.]
[Illustration: DR. WILLIAM KONRAD ROeNTGEN, DISCOVERER OF THE X RAYS.
From a photograph by Hanfstaenge, Frankfort-on-the-Main.]
THE NEW MARVEL IN PHOTOGRAPHY.
A VISIT TO PROFESSOR ROeNTGEN AT HIS LABORATORY IN WUeRZBURG.--HIS OWN
ACCOUNT OF HIS GREAT DISCOVERY.--INTERESTING EXPERIMENTS WITH THE
CATHODE RAYS.--PRACTICAL USES OF THE NEW PHOTOGRAPHY.
BY H.J.W. DAM.
In all the history of scientific discovery there has never been,
perhaps, so general, rapid, and dramatic an effect wrought on the
scientific centres of Europe as has followed, in the past four weeks,
upon an announcement made to the Wuerzburg Physico-Medical Society, at
their December meeting, by Professor William Konrad Roentgen, professor
of physics at the Royal University of Wuerzburg. The first news which
reached London was by telegraph from Vienna to the effect that a
Professor Roentgen, until then the possessor of only a local fame
in the town mentioned, had discovered a new kind of light, which
penetrated and photographed through everything. This news was received
with a mild interest, some amusement, and much incredulity; and a week
passed.
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