This duplex aluminum linear slide rule is coated in yellow ("eye saver") plastic and is held together with stamped aluminum contoured posts. The nylon cursor has a convex lens. The front of the base ...

May 19, 2024 20:00:00 'Immersive Math' is a free textbook that makes it easy to understand difficult linear algebra by expressing it in manipulable diagrams ...

This ten-inch mahogany duplex linear slide rule is almost completely coated with white celluloid. The frameless glass indicator has plastic edges. On one side, the base has K and A scales at the top ...