New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1896-03-20
TEsLA.s X-RAY RESEARCHES.
IMPORTANT ADVANCES MADE-fICi'i"'
FORTY FEET-RAYS REFLECIEp-hNi'1
OF Projected PARTICLES.

OF Projected PARTICLES.
Nikoa Tesla in The Electrical Review. -,
am producing strong shadows at distances o VI
forty feet repeat forty iest anu on the Aim
that provision must be made TO guaru ,i,c ne door
my photographs department iocals yea, % from being
spoled by long exposure 10 the stray rays
Even now before me the possibility no, 10 s a
p pa"s at least tenfod What may then ex-
pect? We have TO deal here. evidently. WIN IN, d
iis nature becomes more and more interesting ana
important Here is an unlocked. for result OK an
action which. though wonderful In itseIi. seeia
feeble and entirely incapable OF such expansion ais-
affords good example Of the fru'uuincss VI 0'e
The effects upon the sensitive plate at 20 great
distance attribute TO the employment OF ss PUP ~,
practically any desired potential and the attainment
OF extraordinary speeds OF the projected par 49,
upon uorescent screen is proportionatcy s1eau nd
than when the usual kind OF tube IL employ co.
great developments are 10 be looked for this direc-
ton. | consider ROntgen's discovery OF ehhp,m f
us 10 see by the of fuorescent screen ,h,ous =.
an opaque substance even more beau'''u' o"o
than the recording upon the plate. >. van bavs
made considerable progress and can IresehiE s ays
nounce one more result OF importance ,t ,Sne
dem6nstrating beyond doubt that the Ron'een rays
possess this pr oicrty. one OF the expfins,'s NJ ~,
long Was taken and one OF It's ends tightly closed
by The plate holder containing sensitive PM ~
Of the copper tube was placed thlck piate oi go go
a, an angle OF IS degrees to the axis OF the iuDe
the glass plat at distance OF about 'lgH' ihciles
so thai the bundle OF rays fell upon the latter at an
rays psssei along the axis Of the c2ppnr tube AZ
exposure OF - minu,ss gave h s shadow s was pro-
duced by the reflected rays. as the aiIcc' 49,"
strs,ed Thai even under the severes' toss with
much stronger actions no impression "hat.Eer couls
n that Of the tube Irff'lu.H+- rum
M Intensity OF the action by comparison with an
equiyaent eject due to the SFf s6 a,cr We're e.
nected from tho glass Plate IN ms cNiTrH,.', ans,
am dn1,ng more ana more evidence n support
OF the theory OF moving material particles. -, =
b0mbarlmcnt occurring OUTSIDE OF thr nun" az. .
siu be- sucr~,sful The calculated veocies fully
for actions at distances 81 a. mm'n , as
the g.ass takes place seems evident from thc pre-
OF exhaustion which have descrinrh ~ ny
vious communications. An experiment whnh rs ';'' :,
iratve IT. this respect, and when ln'ehn,l 70
mention. Is the following ~ We ht,aVh a., "a" ,
exhausted bulb containing an ,iectiO'c 70 ~
mnal Of a descriptive coll. We observe siha r'A",
breaking through the SIDES OF ,he gas sal
~ such streamer VIII break thfousn t"t 20
and crack the bulb 1herenpon the vacuum = m
paired; but II the seal Is placed ABOVE me ,c
or I, some other provision is made 20 pre'en' IA,
streamer from passing through the g'ass a. Una, ma,
point II Si'eh oorurS 80 'h h,h proiueins ane hole
Now. the extraordinary thing is that; In spite o,
the connection 10 the outer htnosphNi,' M ~,
cannot rush into the bulb as long as the hole u
very small The glass at the place where the rup
ture has occurred may grow very hot-to such
degree az 10 soften: but IL Will not collapse. bu'
rather bulge out showing tina, pressure rom ths
inside greater than that Of the atmosphere exists
on frequent occasions ! have observed that me
rIsss bulges out and the hole through which me
streamer PUSHES out becomes so large as TO o.
PERFECTLY discernble 20 the eye. As the matter i
rxpeed from the bulb the rarefaction increases and
the streamer becomes less and less intense. where
unon The glass closes again Theoretically sealing
the opening The process OF rarefaction, neverthe
less continues :treamers being still visible on tnt
heated place until the highest degree OF exhaustion
Is reached wheroupon they may disappear Here
then We have a positive evidence that matter II
being expelled through the walls OF the glass.