Storm windows with wooden frames

I enjoyed seeing the variety of Edmonton houses. The styles are different from those here in the Lower Mainland. Some still have old storm windows with three round air holes in the sash.

Wooden storm windows like these, seen near Whyte Avenue in historic Strathcona, used to be common.

I grew up near Edmonton. As a child, I remember opening the inside window so I could poke my fingers through the holes.