I also have used all 3 of these but I was a rank amateur at using the slide rule, likely I embarrassed myself trying to show off using one to calculate the voltage drop of a circuit. Now days they have specialized slide rules and calculators for electricians for voltage drop and motor circuit sizing and I had those also. Paul
Nice, a still live of sorts....while artists of old would paint fish and fruit and flowers as a still life...you paint, as did they, what makes life possible...Best Wishes, Traveller
