Last Updated：2022/12/24
The Indians of the Orellanna, also, tell of horrible noises heard occasionally in the Paraguaxo, […] Others have endeavored to account for these discharges of mountain artillery
on humbler principles; attributing them […] to the disengagement of hydrogen, produced by subterraneous beds of coal in a state of ignition.
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The
Indians
of
the
Orellanna,
also,
tell
of
horrible
noises
heard
occasionally
in
the
Paraguaxo,
[…]
Others
have
endeavored
to
account
for
these
discharges
of
"mountain
artillery"
on
humbler
principles;
attributing
them
[…]
to
the
disengagement
of
hydrogen,
produced
by
subterraneous
beds
of
coal
in
a
state
of
ignition.
