New-York tribune., 1896-02-02

De distinguished. and any abnormal conditions
existing therein can be ascertained by cathode
Photography Is yet very uncertain. DR.. Mousse,
or Vienna, Is said to be meditating elabo-
rate series of experiments in this direction.
The tissues which compose the organs
much like the muscles in chemical compost
ton, II not in color and function. that much
doubt is entertained by medical men on these
points and also as TO the possibility Of study
Ing cancer by the new method. To a certain
limited extent the ncandesCent electric light
has already been used in exploring the human
nteror the stomach and face in particular.
Lamps OF special form are made for this pur-
pose. The attempt has been made, too. to throw
luminous rays entirely through the human BODY
with { powerful light. None OF the results
thus far obtained in this manner are very salts
factory; but II remains TO be seen whether the
invisible actinic rays that give the Rontgen
photographs can be utilized to any better ef-
feet
CROOKEs TUBES HARD TO GET
Some surprise has been expressed at the abil-
ity of London investigators to push their ex-
periments so much further than American scien-
lists have done thus far. But the delay has
been almost necessary. There has been so little
demand for Crookes tubes for many years that
dealers In chemical apparatus have not found II
worth while 10 keep large stock on hahd. Inc
few available tubes from which the air had been
properly exhausted were quickly picked up. ana
II has been necessary. therefore. FOR most
Americans either to wait for fresh supply to
be imported or manufacturer, pl 10 CItdlt "a
vacuum for themselves. This is far more
elaborate undertaking than one might imagine
The same problem bothered Mr.. Edison years
ago when he wanted to get vacuum In his IN
candescent lamp-bubs. This object was dlf-
ferent one from that OF the users OF Crookes
tube His carbon flament would burn up very
quickly If there enough air present to sup
port combustion. The air pump therefore, Is
very important adjunct Of the electric lamp fac
tory. But such high vacuum as is required
for the production Of the cathode ray is not
required In any other laboratory experiments.
Crookes himself obtained much less than a mill
ionth Of atmosphere. II is easier now TO
obtain a good pump than It was twenty years
ago. but a great deal Of time is required 10 Sc
cure the desired results with 1t.
MR. TEsLA'S EXPERIMENTS.
Since the first surprising news OF R0ntgens
work wps received In this city. Nikola Tesla, the
distinguished electrical expert. has been repeat
edly asked to talk on the subject for publication.
This however. ne steadfastly refuses to do. not
because Of any hostility to the Bavarian whose
name Is now in every ones mouth. but because IT
is his uniform practice to decline TO grant news
paper Interview" Mr.. Teslas admirers recSll,
however that IN The Century for last April.
In an article from the pen OF Thomas Commerford
photogrup apis. These represented Mr.. Tesla own
face and that OF Samuel l. Clemens C'Mark
Twan) and were taken with the phosphorescent
glow emitted by vacuum tube OF dli1erent
character from that which bears the Engish
chemists name. No barrier was interposed be
tween the glass and the face: and the rays which
impressed the sensitive plate were reflected from
the object depicted just as IN ordinary photo
graphy. But when the method OF exciting the
light is considered II may he found that there is
q close relation between Mr.. Tesla's phosphoTo-
graphs" and the strange products OF the Rontsen
ray.