I have a Keuffel & Esser 4012 Thacher Cylindrical Slide Rule that I found in the garbage at a university I used to work for. An old early 1900’s building was b

I have a Keuffel & Esser 4012 Thacher Cylindrical Slide Rule that I found in the garbage at a university I used to work for. An old early 1900’s building was being cleaned out, and it was something that had probably sat on a shelf for years. The crazy thing is why it was in the garbage in the first place… The university had a strict inventory policy where anything with an inventory number had to be surplussed properly, whereas anything without one had to be thrown out as there was no way to prove it belonged to the university. And they apparently did not want to ever surplus anything (which lead to it being sold) if it was ultimately someone’s personal property.