It looks like a typical storm window install to me. I suspect
that you pick up on the handles, the top of the window goes up
into a "pocket" far enough to allow you to pull the bottom out and
then let the window down out of the pocket and remove. There may
have been some clips along the sides that needed to be removed to
allow this movement. If you've not opened them each year for
cleaning, I suspect they will be well married together. Flushing
the edges with a garden hose with fairly high pressure may help
flush out spiders, snakes, snails, and puppy dog tails. An air
tip would do similar.

--
~~~~~~~~~~~~~~~~~~~~
DanG
Keep the whole world singing . . .


"Wilfred Xavier Pickles" wrote in
message ...
On Wed, 14 Jul 2010 20:41:47 -0700 (PDT), Sonny
wrote:

There's a good chance it's just stuck.

Thanks,
Will

That window pane unit is really heavy. That's a large window.
It may
not readily move with gentle pressure, but you have to be
careful with
whatever pressure you apply.

Will do. Careful, careful, and more careful.

If there are rubber spacers around the
sash unit, they may be flattened, some, at the bottom and they
are
likely stuck down, also. Try running a thin knife blade around
the
edges... see if you can feel something that would be
contributing to
the "stuckness".

Mostly it won't penetrate at all. Around the bottom, it will go
thru half-way (only) in places.

To be on the safe side, tape the panes well, just in case
one/they
break. Is there some small printing or a logo "tattoo" on one
of the
lower corners of the panes, indicating tempered glass?

No. I checked all 4 corners.

I didn't see
any, in the pics. If there is no logo or printing, the glass is
plate glass and would break into dangerous shards.

The glass looks thin, like 1/8 " or less. When you look thru it
at
an angle (maybe 30 degrees or less), the image is "rippled".
Cheap
plate glass?

I took a tap hammer and a little block of wood to it to see if
the
mounting might break loose a little. Nothin' shakin', but the
spider
got very, very nervous. :-)

Looks hopeless?

Thanks,
Will