New-York tribune., 1896-02-07
DIR. PUPIN'S EXPERIMENTS.
A PHYSICIAN WANTS TO PUT THE RoENTGEN DIS
CoVERY To PRACTICAL USE But 1T WILL
NOT SERVE IN TIRE CASE PRESENTED.

A PHYSICIAN WANTS TO PUT THE RoENTGEN DIS
covERY To PRACTICAL USE. But 1T WILL
NOT SERVE IN THE CASE PRESENTED.
DR. NJ J. Pupn, Of Columbia College. whose ex-
periments in photography with invisible radi-
ance have attracted considerable attention IN ms
last few DAYS was unable yesterday, IN consequence
Of other business commanding his attention. 10 con-
tnue his researches in this direction. His assist
ants however. under his occasional superintend-
cn,e made several pictures with varying success
I'm the course of the day by the same methods
eu,,,ovsd by Dr. Pupin An aluminium cast OF tho
face OF Abraham Lincoln did not come out Win
great clearness but the experiments with the SILVER
haif-dolar and the aluminium clgarette-box con-
talninc three iron nails successfully pro-
luced Two experiments with the human hand
were made with exposures OF four and half
,oirutes and twenty minutes respectively. but In
neither case were the photographs perfectly salts
factory Ii has not yet been thoroughly deter
mined by Or. Pupn as to the most advantageous
length OF time which the Plates should be ex-
poscd and Il was the prevailing opinion in tho
laboratory yesterday that the hand had not been
exposed long enough. The experiments yesterday
were conducted entirely with the Crookes tubes
which were UNEXPECTEDLY discovered in the School
of Mines the day before. Although fitted with
electrodes the electric wires were not connected
,,ersto bur were excited by attaching the wires
TO sheets OF tinfoil wrapped around the exterior OK
tho tubes and leaving an uncovered SURFACE III ths
centre of the tube OF about five inches. Practical.
lv therefore, the tubes completely devoo
of electrodes as the homemade tubes whico
DIR Pupin employed in his first experiment.
Although not actively employed personally IN ths
work performed yesterday. DIR. Pupn is by no
means idle ard Is making preparations for carry.
ing out some comprehensive and more advanced
experiments In the future For this purpose
he is having made a large number OF vacuum TUBES
of large size and of various shapes with when ne
hopes either to improve upon or modity consluc''
ably the methods adopted by Professor Rontgei.
Probably the first instance in which IL mas oeen n
sought TO turn R6ntgcns discovery TO practical us4
up Yesterday Dr. Landon carte. Hras ~ ~
Ne East Forty -ninth-st called about ociocn
last evening upon DR. Pupn at Columbia College tor
the purpose OF consulting the latter as 10 the pat
ticabty of locating the seat OF cancerous e.omrn ~
in the held OF "A patient. Subsequently wnen apss
preached by a Tribune reporter DR.: Gray deeiiine~
10 make the details of the public at TINS tlnc'
1t was ascertalned. however, that DR.. Grays Puit.
were possible 10 obtain photograph OF tne III III
terror OF his patients head. Unfortunately. ~.
Pupln unable 70 assist DR.. Gray IN any way, III
the reason as the former explained. that the skui.
being opaque the rays would not penetrate 10 inc
interior OF the head As DIR. Pupin told IriDuie
reporter yesterday afternoon, Rontgene diScoVety
has not yet reached sufficiently developed slafs
to make it applicable to such cases Prooa.py@ III ~
the future he said. It may be devoted to euch PUT
poses when means have been found for intensity
ing and concentrating the rays -, -,,.,, ~,,.
Professor X. Ogden Doremus, or the lily ~.
lege IL was rumOred yesterday, had succeeQeo ~
making some successful experiments wsss sas