New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1896-03-11
NIKoLA TESLA on PHOTOGRAPHY.
Ills INTERESTING EXPERIMENTS AN ACCOUNT
or THEM BY HIMSELF.


or THEM by HIMSELF.
.The Electrical Rcviex" publishes to-day a COM
muncation from Nikoa Tes:a. describing for tho
first time his interesting experiments in photography
The scientific world has been eagerly awaiting an
expression OF opinion from Mr.. Tesla. who Is known
TO have begun his experiments within half an hour
after the news OF Professor R0ntgen's discovery
was cab.ed to this country. In connection with Mr..
Teslas communication The Electrical Review
prints two remarkable photographs one OF these
shows the right shoulder OF man taken through
his clothing. plate OF glass three-sixteenths OF an
Inch thick and two inches OF wood. This radoGraph
which was made at the distance OF four feet from
the source Of the rays. shows the ribs shoulder
bones and bones OF the upper The other
Photograph shows a copper wire bent to form the
word 'Rontgen." and made at distance Of
eleven feet from the wooden slide covering the
sensltized plate.
STREAM OF MATERIAL PARTICLES.
Mr. Tesla says that the rarefaction OF the Crookcs
tubes used in these experiments may be increased
By electrical means TO any degree desirable far be-
yond that obtanab.e by mechanical appliances This
method he describes. In regard 10 the nature OF
rays he says: Il am getting more and more con-
WINGED that we have dea. with stream OF
material particles which strike the sensitive plat"
with great velocity. Taking a. basis iho "st!-
mates of Lord Kelvin ;he spe"l ~ projected
particles IN u Crookes bulb. We arrive cssly BY the
employment OF very high poteniia.s to s.ccIs u as
much as 100 kilometres a second. No". again. the
o.d question arises: Are the particles from D."
c.ectrcdc or from the charged surface generally.
including the case OF external elecrode projected
through the glass aluminium walls. or do they
merely hit the inner surface AMI cause particles
from the outside OF the vail to ny on. acting IN a
purely mechanical way as when a row OF ivory
balls Is struck? So FAR. most Of the phenomena
indicate thai they projected through IN" wal! %
the bulb OF whatever material IL may Dc. ana am
aTl. M for ~ 4
direction. II Is now demonstrated beyond
any doubt that small metallic objects or b1ny or
ohaky deposits can be infallibly detected IN any
part OF the BODY.
RADIoGRAPHs OF BIRDS AND RABBITS.
The writer has alro secured IA Autographs rho wing
the bony structure birds and rabbits - the
hollow 81 the bones He has obtained a "a liograph
OF a rabbit after hours exposure. IN which not
only every detail OF the skeleton IL visible. lr;
clear outline OF the abdominal cavity TIE lo,etol
Of the uncs and the fur are shown IaiogfapAs
OF large birds show the feathers distinctly. In an
other instance an exposure OF forty minutes ga"
radiograp pm az the human skull showing clearly not
only the outline but the cavities OF tho eye. chin
cheek nasal bones. the lower jaw and connections
to the skull, the flesh and even the har
EFFECTS OF RADIATION on THE HEAD.
Mr.. Tesla closes his communication in the follow
!ns words by exposing the head TO powerful
radiation strange effects have been noted. For In
stance find that there Is a tendency To sleep. and
the time to pass away quickly There is n
general soothing effect. and have felt a sensation
OF warmth In the upper part OF the head An
sstant Independently confirmed the tendency 70
s.eep. and quick lapse OF time Should these re
r1arkabc effects be verified By men with keencr
sense Of observation. ! shall still moro firmly be-
lieye in the existence Of material streams gene;rat
ing the skull. Thus, II may be possible BY these
strange appliances 10 project suitable chemical
into any part of the body
"R0ntgen advanced modestiy his results. warning
against too much hope. Fortunately. his aparehon-
sons were grouniess for. although have = al
appearance 10 deal with mere shadow projections
the possibilities of the application OF his discovery
are vast. | am happy 10 have contributed to the
development Of the grel, arr he has created"