Addiator Slide Rule Popular Q&A

Q: Who Invented the Slide Rule?
A: The slide rule was invented by a man named William Oughtred in 1625. Slide rules continued to be used until the first handheld calculator was produced by Hewlet... Read More »

Q: How does a Slide Rule Work?
A: Understanding a slide ruler is very easy. The true principle of the slide rule is some time very simple enough. You will want to take two ordinry rulers and sta... Read More »

Q: What Is a Slide Rule Used For?
A: Multiplication is performed by adjusting the movable scale so that its marking for the number '1' on scale C is lined up with the number desired to multiply by ... Read More »

Q: How to Operate the Slide Rule.
A: 1. Slide the C scale to the right, so that it starts at one of the numbers you wish to multiply on the D scale. This lines up the 1 on the C scale with the numb... Read More »

Q: How to Use a Slide Rule.
A: 1. Convert inches to centimeters step by step. One inch equals 2.54 centimeters. So we need to multiply by 2.54. Ad. 2. Align the 1 on the sliding part with 2. ... Read More »

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