The morning news. [volume] (Savannah, Ga.) 1887-1900, 1896-03-21
NIKOLA TEsLA's RADIOGRAPHs.
The Great Electricians Theories OF
\ Rays-InterestIng Experiments.

The Great Electricians Theories OF
Rays-InterestinE Experiments.
From the Baltimore American.
New York, March l0.-The Electrical Re
view will publish tomorrow a communi-
cation from Nlkola Tesla. describing for
the first time his very interesting expert
ments in photography. The scientific world
has been awaiting an expression of opinion
from Mr.. Tesla. who is known to have
begun his experiments within an hour after
the news OF Prof. Roentsen's discovery
was cabled to this country. In connection
with Mr.. Tesla's communication the Elec-
trical Review prints two remarkable
photographs. One OF these shows the
right shoulder Of a man taken through
MS clothing. plate of glass three-SiN-
teenths of an inch thick, and two inches
OF wood. This Photograph, which was
made at distance of four feet from the
source OF the N-rayS, shows the ribs,
shoulder bones and bones of the upper
arm. The other photograph shows a cop
per wire bent to form the word "Roent-
gen." and was made at a distance of elev-
en- feet from the wooden slide covering the
sensitized plate.
Mr.. Tesla also states that the rarefac-
ton of Crooke's tubes used In these expert
ments may be increased by electrical
means to any degree desirable, far beyond
that obtainable by mechanical appliances.
This method he describes. In regard TO
lAlN AG VI A-AdA - he sd9Ss an 81
ting more and more convinced that we
have to deal with a stream of material
particles. which strike the sensitive plate
with great velocitles. Taking as a basis
the estimate of Lord Kelvin on the speed
OF projected particles in a Crooke's bulb,
we arrive easily by the employment OF
very high potentials to speeds OF as much
as hundred kilometers second. Now
again. the old question arises: Are the
particles from the electrode or from the
charged surface generally, including the
case of an external electrode, projected
through the glass or aluminium walls, or
do they merely hit the inner surface and
cause particles from the outside or the
wall to fly Off, acting in purely mechani-
cal way, as when a row OF ivory balls
is struck? So far, most of the phenomena
indicate that they are projected through
the wall of the bulb, of whatever material
II may be, and / am seeking for still more
conclusive evidence in this direction.
ut is now demonstrated beyond any
doubt that small metallic objects or bony
or chalky deposits can be infadhDly de-
tected in any part of the body.
Tesla has also secured radiographs
showing the bony structures of birds ano
rabbits, even to the hollow of the bones
He has secured photograph of a rabbit
after an hours exposure, In which. moi
only every detail of the skeleton is visible
but also a clear outline of the abdominal
cavity, location of the lungs, and the fur
are shown. photographs of large birds
show the feathers distinctly. In another
instance an exposure Of forty minutes
gave u FauloeEdph ol the hhuan Shull
showing clearly not only the outline. bul
the cavity of the eye, chin, cheek, nasal
bones, the lower jaw and connections 70
the upper one, the vertebral column anc
connections to the skull, the flesh and
even the hair.
Mr.. Tesla concludes his communications
in the following interesting words: by
exposing the head to a powerful radiation
strange effects have been noted. For in
stance. l find that there is tendency tc
sleep, and the time seems to pass away
quickly. There is general soothing eff
in the upper part of the head. An assist
ant Independently confirmed the tendency
to sleep and quick lapse Of time. Should
these remarkable effects be verified by
men with keener sense of observation,
shall still more firmly believe in the ex
istence of material streams penetrating
these strange appliances TO project I
suitable chemical into any part Of thu
! body"