Dr. Peter Selinger will give this month's presentation: Fun With Slide Rules

The slide rule, based on an invention by John Napier in the 17th century, was the most important calculation tool for scientists and engineers for almost 350 years. It was still in widespread use in the 1950s and 1960s, but disappeared almost completely after it was replaced by the electronic calculator in the 1970s. In this math circle, you will learn how to use a slide rule to compute multiplications, divisions, roots, powers, and other operations. You will also learn some of the theory behind how a slide rule works. Each participant will assemble their own working slide rule out of materials that will be provided.

To ensure the safety and enjoyment of all attending the event:

- If bringing 5 or more students, it is expected that a parent/teacher/guardian remains with their students for supervision.

- If bringing 4 or fewer students, we prefer if a parent/teacher/guardian remains at the event; however, if this is not possible, please leave an emergency contact number in the RSVP to the event.

Pizza and pop will be served. To give us accurate numbers for food orders, we ask that you RSVP to




Colloquum Room #319, Chase Building