hich, in all probability, would have otherwise
remained in the man's hand to the end of his days." All of which
indicates that the needle which has pursued its travels in so many
persons, through so many years, will be suppressed by the camera.

"My next object is to photograph the bones of the entire leg,"
continued Herr Spies. "I anticipate no difficulty, though it requires
some thought in manipulation."

It will be seen that the Roentgen rays and their marvellous practical
possibilities are still in their infancy. The first successful
modification of the action of the rays so that the varying densities
of bodily organs will enable them to be photographed, will bring all
such morbid growths as tumors and cancers into the photographic field,
to say nothing of vital organs which may be abnormally developed or
degenerate. How much this means to medical and surgical practice it
requires little imagination to conceive. Diagnosis, long a painfully
uncertain science, has received an unexpected and wonderful assistant;
and how greatly the world will benefit thereby, how much pain will
be saved, and how many lives saved, the future can only determine. In
science a new door has been opened where none was known to exist, and
a side-light on phenomena has appeared, of which the results may prove
as penetrating and astonishing as the Roentgen rays themselves. The
most agreeable feature of the discovery is the opportunity it gives
for other hands to help; and the work of these hands will add many
new words to the dictionaries, many new facts to science, and, in
the years long ahead of us, fill many more volumes than there are
paragraphs in this brief and imperfect account.

THE ROeNTGEN RAYS IN AMERICA.

BY CLEVELAND MOFFETT.

At the top of the great Sloane laboratory of Yale University, in an
experimenting room lined with curious apparatus, I found Professor
Arthur W. Wright experimenting with the wonderful Roentgen rays.
Professor Wright, a small, low-voiced man, of modest manner,
has achieved, in his experiments in photographing through solid
substances, some of the most interesting and remarkable results thus
far attained in this country. His success is, no doubt, largely due
to the fact that for years he had been experimenting constantly
with vacuum tubes similar to the Crookes tubes used in producing the
cathode rays.

When I arrived, Professor Wright was at work with a Crookes tube,
nearly spherical in shape,