New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1896-02-28
NOVEL Y RAY EXPERIMENTS.
PHOTOGRAPHY DISPENSED wlTH-Molio''
INSIDE OPAQUE BODIES MADE VISIBLE

,,,orocaApuy DISPENSED WITH-MOTlON
INSIDE OPAQUE BODIES MADE VISIBLE.
Some novel and important experiments were
made Yesterday with Professor Rohtse"' 10
nv Edward p. Thompson, OF ps CITY, wiz" VIZ
aid OF electrical apparatus and vacuum 'uoe' ~
n him by Professor Mckay, OF the Packer IN
sn.ute Il; Brooklyn. Nearly every one VINO mas
t,,ouel IN the footsteps OF the Bavaran discoVerer
hos tried merely to make photographs But sew
ara scientists among them Mr.. Thompson pro-
noses TO render visible the shadows cast oy al.
nhiect immersed In the invisible rays. so that II
there be any motion within. as IN h""s Do0''
such motion be seen Instantly
AZ has been pointed out already in Inc tribune
this result is produced by throwing the shadow
M, on a sensitive plate, but on what Is caheo
"euorescent screen" This Is a fiat surface OF some
material which possesses the property OIL eni'.'"s
n blush light under certain circumstances ohe
mart of RUntgen's discovery. which has been Amos.
entirely ignored. Is the fact that the ~ rays W."
excite nuorescence IT, then. the experiments De
conducted In n dark room II the experimehter
nnds way to exclude all light from his eyes
oxcen, that developed on a nuorescent surface OH
which the rays fall after going through So.'o
translucent object like the hand ne should De ao'e
to see Immediately what II would other"'se ."N
near.y an hour Of time and great uea' " wa"
to register photographicf1y.
Talking with a Tribune reporter. Mr. lhofhpson
who calls his instrument "kinetoskotoscope, saiu
MY first experiment to-day was an attempt '"
show that II bone were broken IN hVns pe'
sons limb the fracture could be made visible p'
bending or stretching the limb | began by 'aN''s
From, nppos,te ends until they met These rods were
nvis bic the eye by ordinary hght WIN '' H.
r,ds within the tube became instantly visible on the
huorescent screen. and the rods coua , ne ornone
| bamboo tube. while the latter appeared as IL
made OF glass. -, ...,, altar,
! OF a solid passing through a solid. largs heeuae
was driven through block Of wood. ana ,n e Ron.
Somewhat similar experiment was performed with
the hand The needle not driven through o tne
flesh but on the side OF the hand opposite tue ey ~
and the needle was clearly visible. and the moving
point could be followed to different parts o, ,ae
tons where II would be desirable to follow me point
the instrument through the hesh IN
! its opaque rubber cover. A., c,
| Former experiments were repeated ,o,oay sue .s
as opening and closing the finger wniie IL "as
/ plunged In the X-rays Very rapid motion was ~.
sorted in order to test particularly whennr
These and other tests made to exhibit very rsp,a
wes IN The The result. aRy The
shaking OF chain for s es,mpe ,r vey he kne
osko,oscop, These experiments in reference 70
speed would tend to prove that me % b made
visble while In motion even while they were under
going the swifcst movements me inotiom VI nn,E
Generating the X rays Is more fully developed The
| luminous pictures were produced at distance ol
| I'VE feet from the Crookes tube ana the luminosity
aup.ared family at SIX feet
Professor PIpin OF Columbia College is In state
OF considerable doubt just now as to when ne WIZ
be able 10 continue his experiments new ana
larger Induction coil is necessary 10 the proper aI
| iustment and employment OF his static battery he
has eont 10 Boston for this coll. and was yesterday
trying TO secure In New-fork. but up 70 lale
hour hsd had no success. 80 far as VISIT 10 ,ne
operafing- room ut Columbia could demonstrnte iiis
assistant was asked about the photograph "hlch
b they had succeeded In making OF a bullet In me
hand Of Professor Marston + Bogert, assistant pro
srssor Ct chemistry I'm Columbia He laughed as
though pleased over n rerniniScence. ana shld hat
about Two weeks ago Professor Bogcrt CHANGED 10
come into the room. and happened TO remark some
thing about a bulle; which had been IN his mana near
the bail OF the thumb, for about twelve years ne
said II hal never bothered him particularly. But
met M this time a with bullet roaming
around or cncvsicd anywhere In his BODY IS rare
treasure and before he knew II the professor had
his hand extended and a negative taken IL was
excellent. although the operators agreed 'hat the
| exposure was hardly OF sufficient length As Il
result OF this the prints from the negative were very
dark but the ball could be plainly discerned ~ IA
| no, likely that any experiments VIII be maze ihis
week