The Coalville times. [volume] (Coalville, Utah) 1894-1923, 1897-09-24
MINING MATTERS.
FINpINo cole WIrH x-RAYa.
They Also Reveal the Prssenoe Of snrss
Copper and Lead.

They Also Reveal the Prsseaos Of snv.s
Copper and Lead.
Making assays OF ore supposed to
contain precious metals by means OF
the \ ray Is the latest phase OF the
development Of the wonderful device
discovered by Professor Roentgon. NOT
only has this been demonstrated to bs
possible, but is Is also practical.
which Is Of a great deal more Import
ance. This discovery opens tie
Wdy to rich gold finds In places where
gold would not, under ordinary cir
cdmsinnces be supposed TO exist.
! DR.. II. u. Hcnnessey OF Nnpa. Callfor.
MIA. who Is well known rs scientific
investigator. Is the dlscoveror OF tho
unique scheme Just referred to. lie has
hotn nt work on Il for a long time,
and all who make scientific research.
~ must. but he Is now ready to give
the results OF his discoveries to the
world. that all may profit by them.
Dr. Hcnnessey makes no attempt TO
Keep his methods secret. but Is willing
that they be utilized where they do
the most good.
! Gold quartz was the rock with
which he first had any success. In
making his experiments he plvOted in
his results. At one time he would bs
successful. nnd 90 another he would
DO very far on Different exposures
seemed TO have very little to do with
u, for with the same piece OF ore ON
the same Kind Of plates the results
varied 20 the widest degree. The doc
tor then began making records Of the
exact condition of his tube during tho
| different experiments II 50 happened
that he made an exposure when his
tube was very slow and was surprls-
cd TO get good Indication OF ore I'm
a piece OF quartz A little longer OK.
posture and the result was better And
~ II went on until the proper time OF
/ exposure was found. lie had demon
strated mat low tube, or one that
does not produce many N.rays was
the best for the purpose. II has long
been known that n tube OF this Kind
always give the strfngcst contrnsts,
but II Is undesirable for surgical work
ON account Of the time required to
make the exposure. In making assays
this IL. or course, a matter OF no Inn
portnncc.
Why the low tube should produce
better results than the high tube IL
easily understood hynnybody acquaint-
ed with photography. A dim light In
room viii make stronger shadows
In n photograph than strong one in
a given length Of time. In the case
or the N.ny. the high tube crcatee n
radiance that has tendency 10 pass
through everything. and 10 II happens
that by the time n certain part OF the
plate Il exposed enough tho other
parts are overexposed. and conse-
qucntly show no contrast. The results
Is very much the same Ms n the plate
had been logged.
After Or IIcnnessey had reached per
fcction In making N.my pictures Of
gold ore be tried different kinds Of
other ore, and the results were most
surprising. The difference between
gold and silver n OF the widest de-
scrlptlon, and conper aud lead are very
different from either. Gold looks like
ffust markings on window pane
while silver looks like tiny specks.
Different ores In the same piece OF rock
are all plainly dlstlngulshnble. And
not only does the N.ray show that
there Is gold IN a certain rock. but "a
also appropriateness how much OF the
metal there H. Dir Hennessey has
tested this. and found that Il II quite
reliable. Certainly enough 60 tell
whether the ore Il worth making a
series OF tests OF.
The most surprising discovery mndc
, - DR.. 1lennessey. though. Il the fact
that the N-rny win show gold IN n rock
shat has no outward sign OF It's exist.
cncc. Several pieces found In the Nnpa
hills. OF such character that no miner
would look nj them for more than n
moment. before throwing them aside
M worthless. under the X.ray proved
10 contain layer Of thin gold: small
In quantity. but nevertheless gold. The
accompanying drawings show the out
side Views OF bits Of quartz. Many OF
the pieces OF quartz examined did not
show any signs OF gold on the outside,
even when put under a strong magnl-
tying glass.
or course. the great advantage OF the
N.ny In assavlng Il lis chenpness. Ex-
nmlnnilons OF thirty small pieces cnn
he made on one plate nj cast OF about
81 M the most The same work done
In the usual manner would cost ne
least $50. II will aow be an easy mat
fer Tor miners 10 take a number Of
specimens, have them put through the
N-rny process aud determine whether
they contain gold or not. Oftentlmcs
miners VIII throw away good epecl-
mems because there are no outward In.
dlcatlons Of gold. 10 get these pieces
tested NJ 81 apiece Is more than most
miners can nfford. The time has now
come when the work can most easIiv
be done by N-rhy operators for ahnut
10 cents apiece In large lots. This
really means n revolution I'm prospect.
Ing, ana the ground Of the state IN
sure 20 be more thoroughly worked
than ever before,