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 is a two-foot, two-fold boxwood ...

This 22-inch, two-sided wooden slide rule has scales that are printed on paper but not engine-divided. On the front of the base, logarithmic scales are labeled B and C on the left and D and D on the ...

It was the only technological tool widely and continuously used for over three centuries. For math and science geeks it was a badge of honor, nestled neatly into a plastic pocket protector along with ...

We recently ran a post about engineers being worse, better, or the same than they “used to be” and it got me thinking. Of course “used to be” is in the eyes of the beholders. To me, that’s the 1950s ...

In 1622, William Oughtred created the first slide rule, a simple and easy-to-use calculation device consisting of two parallel logarithmic rulers that can slide past each other. It was the beginning ...

In our most recent 5 Engineers post — part of this blog and our Fun Friday newsletter, where we toss out a question and invite our audience to respond with their wittiest answers — we asked: What’s ...

The slide rule, sometimes called a slipstick, was a type of mechanical analog computer. It was and still is, used primarily for multiplication and division, and also for functions such as roots, ...