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Vintage Circular Slide Rule Popular Q&A

Q: How to Read a Circular Slide Rule.
A: 1. Convert the values being calculated to numbers which appear on the dials of the slide rule. The numbers of the dial only reach a certain level, and if your n... Read More »

Q: What is circular slide rule?
A: ( ′sər·kyə·lər ′slīd ′rül ) (mathematics) A slide rule in a circular form whose advantages over a straight slide rule are its precision, because it is equivalen... Read More »

Q: Who invented the circular slide rule?
A: In 1630, William Oughtred of Cambridge invented a circular slide rule, and in 1632 he combined two Gunter rules, held together with the hands, to make a device ... Read More »

Q: Science Circular Slide Rule
A: Before assembling the cursor, you'll want to oil the slide. I used stone sharpening oil since it was the only thing I had on hand, but it ended up working very ... Read More »

Q: Science Circular Slide Rule
A: (I actually did this part after I assembled the slide, but you'll definitely want to do this BEFORE assembly.) The scoring marks weren't bright enough to be abl... Read More »