The Anaconda standard. [volume] (Anaconda, Mont.) 1889-1970, 1899-10-05

The witness said that the laws Of re-
deposition are not well settled and that
the subject is not thoroughly under
stood by biologists. He understood that
there were other authorities taking OPP
posing views to those quoted, but he
had not read and did not agree with
them.
do you find any ore below the region
Of oxidation that did not exist there
before oxidation?' asked Mr.. Hughes.
mo; except at the top of the sulphide
region said the witness.
What do you find there?'
81 find scattering oxides of copper
What was it you said you did not
consider important, in your direct eX-
amnation?"
THE question of redeposition."
did you say that you regarded the
presence of enargite ore in the sulphide
region as an evidence that there is no
ore there that was brought down from
the oxide region?'
II said ] regarded it as one proof"
You said that the presence of or
ganic matter would be necessary to
produce precipitation. Does not the
water that seeps down from the sur
face contains organic natter
THE organic matter is exhausted in
the process of oxidizing the ore above.
1t cannot act as an oXidizing agency
be exhausted before it could perform
the latter function
Mr. Hughes read an authority to
show that the organic matter carried
down by the water can form sulphur
cited hydrogen, which is preciptating
agency. The witness said that he
agreed with all that was read. saying
that it was right in line with his posi-
ton. He and Mr.. Hughes did not un
a ct,,, III f,sr, 1,n cfnt
ment read. After this Mr.. Hughes read
long treatise upon the mechanical and
chemical offices Of water, specially rain
water The treatise said that all rocks
are porous and permeable by water.
and that oxidation is one of the most
universal phenomena produced by
water in connection with rocks. 1t
said that sulphides give rise to sui
pilates and to the release of pure sui
phuric acid. Sulphuric acid in contact
With iron in another form than pyrites
gives rise to sulphuretted hydrogen.
The witness said that the necessary
form of iron does not exist in the dis
puted ground. The pyrites are there.
but they are already saturated with
sulphur Mr.. Tyler said that this quo
tation was also in line with his posi-
ton.
"Would not the sulphuric acid COM
ing in contact with the iron in the ore,
produce sulphuretted hydrogen, Mr..
Tyler?" asked Mr.. Hughes
mo. sir: the necessary form of iron
does not exist in the ground. There
are iron pyrites there, but they are al
ready saturated with sulphur said the
witness.
Mr. Hughes read another authority
which quoted a case of redeposition.
The witness interrupted him to say
that the redeposition referred to was
speculation, and that the author did not
know that the gold supposed to be re-
deposited was in the ground or not.
His name is Hill. and Mr.. Hughes asked
the witness if he was not eminent in
his science The witness replied that
all the geological spectators are emf
nent. Mr. Hughes said that such is the
case unless they reverse their specula-
tons, and the witness smiled. The next
authority read by Mr.. Hughes con-
cerned the ore deposits in Butte. This
authority states that the deposits here
are re-enrched below the oxide area,
and below the zone of re-enricnment.
resume their ordinarily minerallzed
condition. In the re-enriched zone the
ore bears as high as so per cent OF cop
per, and below drops to as low as per
cent.