78
DOC.
108 JULY 1908
If
there
were
no
fins,
then the
Hg
would
constantly
form
a
curve,
e.g.,
like this
-
but
if
there
were
fins
here,
then
no
Hg
could enter
at
a
spot
where there
is
a
fin
thus,
the
Hg lags
considerably
behind because
the
radial
velocity
is greater
than
3
m
Curve
the air
increases.
Hg
Curve
Now,
after the
fin
has
passed,
the
Hg
enters
again,
like this
and
a
certain
quantity
of
air will be cut off.
I
think that
one
can
achieve
quite
good
efficiency
in this
way.
Cordially, your
P.
H
Hg
Hg
Hg
Hg
air