The old site search from Google needs to be updated. Use the Search at the Upper Right, or use What's New in the center - it has a drop down arrow. You will need to change your Favorits by right click mouse and clicking favorites. Many of the posts in How to Use This Web Site are old so the links may or may not work. I have one hell of a lot of work to do!
The item in your first picture is a 1930s vintage WRIT AC voltage regulator. (dimmer switch) The numbers in the little window are degrees of adjustment. If it didn`t electrocute you it could burn you when you touched it. AL .