260 / 330
260
600
MISCELLANEOUS
VALUABLE
RECEIPTS.
appearance
of
silver
a
little
below
standard
;
by
some
persons
it
is
even
preferred
to
the
more
expensive
compound.
We
strongly
recommend
manufacturers
not
to
use a
metal
inferior
to
this.
No.
583.
Gerraayi
Silver.
No.
3.
Electrum.
—
Copper,
8
;
nickel,
4
;
zinc,
3i.
This
IS
a
compound
which,
for
ease
of
working
and
beauty
of
appearance,
is
to
be
preferred
to
all
others
by
the
manufacturer,
and
is
generally
preferred
by
the
pub-
lic.
It
has
a
shade
of
blue
like
very
highly-polished
silver
;
it
tarnishes
less
easily
than
silver.
No.
584.
German
Silver.
JVo.
4.
Copper,
8
;
nickel, 6
;
zinc,
3|.
This
is
the
richest
in
nickel
that
can
be
made
without
injuring
the
mechanical
properties
of
the
metal.
It
is
a
very
beautiful
compound,
but
requires
a
higher
heat
for
fusion
than
the
preceding,
and
will
be
found
rather
more
difficult
to
work.
No.
585.
German
Silver.
No.
5.
Tutenag.
—
Copper,
8
;
nickel,
3
;
zinc,
4|.
These
proportions
were
obtained
by
the
analysis
of
a piece
of
Chinese
tutenag
of
the
best
ordinary
quality
;
but
some
of
the
specimens
of
Chinese
tutenag
are
equal