UPDATE: window is fixed! The solution is here: youtube.com/watch?v=-TAjm4X8ubI
I have a single-hung Madison window. The moving part has come loose and disassembled and I can't get it back in.
There are two rods that fit into spaces at the sides of the window frame. (See links to images below, but I will try to describe them.)
These rods are notched and there is a combination of a spring and a cord inside the notch. At the top ,the cord is fastened to a a little doo-dad that inserts into a hole in the larger window frame and anchors it there.
These rods act like rails when the window slides up and down.
I can fit the window into place if the rods are not there. And I can put the rods in place if the window is not there. But I can't get them both in at the same time. Do the rods go in first? Does the window? Do I put the rods in the window slots first? There's no give in the jamb and with the rods in place the window is too big.