Bathroom reno continues. When the south wall came off, it revealed some curious artifacts. 
These were part of an old window. They hung along the sides and must have been used as ballast to make the window function smoothly. When the old window was replaced, they were left in the wall. We’ll find some way to re-purpose them in the garden.
27th Street 
The term is “sash-weight.”
http://www.thefreedictionary.com/sash+weight
Sic transit gloria mundi. This was cutting edge technology, once. Cue Sir Isaac Newton, I think.
thank you!