The herald-advance. (Milbank, S.D.) 1890-1922, 1922-02-15

Artificial Turner's reduesd il
White Rats d llnisst6g
Them With Pafasltss.
x-Ray MACHINE IS IMPROVED

Rays o. Unusual Pt~sr osvssoosd ~
Recently Perfected Apparstns
viii Greatly AID 10 ,0ures-
IL Netabls AdvancA.
New York.-what IL calles'ssa most
important and farlresching contriba-
ton to cancer research" MAIDS
known by DR.. Francis Carter W00ds ~
rector Of the Columbia Untvl10lty In
stitute Of Cancer Research, lpdpwsl
By George Cfpckers "a ! repQf4slQ THes-
idens NicholasaAlurrays Beflsls All
.dDocter WoQdsA1AA4eg TIT ~
workers In TIE. Columbia .IobnEat1ktlA
DR.. FREDERICK u. Bullock ,apaE ~M
r, Curtis, Pm. d, both tahkihSe q -
ciate In cancer feAAafch,. hlt1 0fee6v-
cred I is,e4ns OF producing e1nafe asts
Actaify In falts. :lafakesasamhefs iifNl1c1
are constantly snsed n CsD1ia1aaAS
work !of cancer reseafch. 4sAs "a
After .nve. years a hAFi work.
says Doctor Wood. doctors Bullock
and Curtis have finally shown that ,lf
white rats be infested with - e.
Of q certain parasite and kent f6f
period of+ not. less than ei~ghts1nvntit1s
tumors will develop about the Sgeas r.
which the parasites are present, and
that these tnDsEs are virulent cancef1
which rapidly kills the aI1Nals n
which they start and car easily b.
transplanted to 0therA
This Is not the frst time that can
Ger has been produced Vrts1e1alNl5. II
Is just 146 years since the LO1doB sufA
geon Pott showed that certain types %
cancer follow certain occupations u
which irritating substances eeaer44
contact with the body. The dpeafA knows
Of these types Of lancer n the china
~ney-sweeps' cancer. which developed -
such an extent In England that laws
were passed regulating the cQnaitiop1
under. which chimney sweeplng. cQnl4
be done. = !.
Names Forms o. cancsss.
'Other forms Of irritation cancer afs
the well-known Kangrl basket cllhcer
Of the Kashmir native. the betefSnut
cancer on the Inner surface of the
cheek amOng Malays -snA aDllplnos.
and the cancers following eAsoGaic X
ray.4d ermatitis. 1t has also .beeA ~known
that 1t is possible to obtain . eonstdee-
! able number Of cancers In animals by
.~inbreeding cancerous strains bgt eems
years are required to k6t enough ttock,
the number Of tumprss q obtained IS
not always large, and the time ,of Stheir
appearance cannot be determined, 80
that experiments requiring aslahy tu-
mors cannot be planned. 81
Another means Of inducing cancer
has been by painting the skin Of m
animal with ar This, experiment h
based upon the observation that work
ers in briquette factories, where the
| skin of the hands i1.cQnstantly h Goa
tact with fnr. not 1Affsauently dsSel6p
cancer Professor .Ftbiger of iCopen-
hagen has shown aisttlat cancers can
be produced in the, stomachs Of rats
by feeding the aasisnals on - certain
parasite. but herssatqb the actual per-
centage Ut production, Is small.
In the method devised in this lab.
oratory. however, the yield Is very con-
siderable, over half the animals OF \
certain strain developing CANCER
Doctor Wood quotes DIR. j.. A. MUIR
ray, director Of the Imperial Cancer
Research Fund, London, a noted inves-
tigafor OF cancer, MS saying recently
that zone of the great disadvantages
| which retards progress iii the study OF
canoe. is the absence ora means OF
producing tie diseases at will IN exper-
mental animals
with the discovery .las'a In this
laboratory" Doctor Muctisspdus, this
disadvantage no longer exiStsj,s
Doctor Wood reports the e0hstruc-
ton III Il new machine tlFapgfT. (which.
durji z the coming winter, will be add
| ed new and important facts to the
very vital quest ion Of the treat4ieht q
cancer nv N-rn5 I 10. saast.
Seek High-Rowert x4RAys.
..Tlei., has been under considers
lion for some time" he. continues, dis
| GUESSING experimental work.. the erec-
ton of an apparatus. for the produc-
ton of u direct current ut high volt.
ages in order to produce X-rays Of UNI
usual power, as the limitations Of the
commercial machine In certain modes
| Of treatment nre obvious.
The matter had been discussed III
IN informal way during the last two
or three years with q number of ex-
perts, among them Professor Duane
and Professor Davis, and at the last
annual meeting OF the Croker board
it vas proposed that the accrued ~
come Of the Bondy fund be devoted
to the construction Of q more power.
full constant current X-ray apparatus
than had yet been attempted, with tha
necessary equipment to permit * -
curate determinations - sphyaleaI
units ct the exact quantity d EGdio-
tion given or BY the Xrrny tnn0
Many unforeseen .dl1lonnt1oS
8AWA