Any wooden window frame with a single glass is easy to turn into a double, having received a kind of glazing is not worse than common now brand.
This will require a brace or composite rod-the glass bead and a slightly larger format than is setup in the window so that you can lay on the frame and press with rail, bothering and seal with a rubber strip or putty.
Recommend to read
THE SPEED CHANGE RODS
As you know, for different road conditions: descents, climbs — many types of bikes use a block of sprockets of different diameters for changing torque to the rear driving wheel. These...
COMFORT FOR THE BABY
It happens in every family: it accomplished the great mystery of nature, man is born, bringing much joy, happiness, excitement and hassle. And let it warm just a helpless lump, still...