Universal valve slide rule
||Donor's ID number for rule
overall: 3/8 in x 13 in x 3 in; overall: 3/8 in x 12 in x 2 3/8 in
Object consists of the slide rule, case and a reference card. The case has a sticker witih "Fisher Controls" written on it.
Pre-computer: slide rule
Gift of Mike Konshak