IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This yellow aluminum circular slide ...

A regular slide rule takes advantage of the fact that you can multiply and divide by adding logarithms. Imagine having two rulers marked in inches or centimeters — it doesn’t matter (see the adjoining ...

Around here we mostly enjoy slide rules. We even have our own collections including some cylindrical and circular ones. But [Mathologer] discusses a recent Reddit post that explains a circular slide ...

This is an early form of calculator. It is used by sliding one of the layers and then reading the corresponding answer on another part of the dial. This object was chosen by the children because it ...

I still use a slide rule. I find it very efficient, much more so than using a computer often times. But I find people at work constantly asking what that "funny looking ruler" is. <BR>A quick google ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...