Today we uploaded a new item to the Internet Archive. It's "A Guide for Uniform Industrial Hygiene Codes or Regulations for the Use of Fluoroscopic Shoe Fitting Devices," by The American Conference of Governmental Industrial Hygienists.
It sounds kind of boring. All right, it sounds really boring, but when you read it you have to say to yourself, "what were they thinking?" It's self-described as a guide "designed to minimize the amount of radiation to which persons are exposed during the use of fluoroscopic shoe fitting devices." In other words, shoe stores had x-ray machines that you stuck your feet in (and our museum has one of them (the machine, not the feet)) to see how well your shoes fit. I dunno, when I was a kid the salesman used to press down on the toe of the new prospective shoes and ask if I could feel it.
Anyway, you can see this guide here.