Details and Image
|Date||Scale Length||Area of Use
|Linear||Aristo / 0971 Hyperbolog||Aristo||Germany||Plastic||1965||25 cm||Engineering
Notes: "The 0971 Hyperbolog was Aristo’s intermediate level log log slide rule with hyperbolic sine and tangent scales added. Essentially an Aristo 0968 Studio with the addition of hyperbolic scales. Overall, it is a very competent slide rule. "