One of the Archives longest artifacts (when fully extended it reaches 18 feet), this model slide rule was donated by the Mathematics, Physics, and Computer Science Department. It was used for demonstration purposes in the classroom. It served as a useful visual aide by instructors who would need to explain concepts on the chalk board to a classroom of students. The students could then follow along with their respective slide rules.
The slide rule was developed in the 17th century and was used for calculations in science and engineering before the advent of the pocket calculator.
Donald Mordell, Ryerson’s President from 1970-1974, also donated his personal slide rule and case. He was a distinguished international engineer and academic.
To see this artifact, and all the others on display in the reading room, drop by the Archives.