In the late 1800's and early 1900's and probably even earlier than that, the process for manufacturing glass was not yet perfected. The process left gas and air bubbles in the sheet as it cured. It left a somewhat imperfect view of the outside world. But functionally, it met the basic needs...kept out the elements and let light in to the dim environs within.

For a photographer, the old glass is the perfect opportunity for a still life. The imperfect glass diffuses the light and mars the image just enough to give a painterly effect. The long exposure captures the moonlit reflections of both the inside and the outside world.