James Peebles bought this slide rule in 1953 when he was studying at the University of Manitoba. It cost 20 Canadian dollars, a rather hefty sum for a student. It became his constant companion in life as a physicist until 1970, when he bought an electronic calculator. He put the slide rule in a desk drawer, where it lay for years, acquiring a patina.
James Peebles donated the slide rule to the Nobel Prize Museum in 2019.
