IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This duplex aluminum linear slide ...

DE MORGAN, in article “Slide Rule” in the Penny Cyclopaedia, points out that though Gunter first used a logarithmic scale, the real inventor of the logarithmic slide was Oughtred. “In the year 1630 he ...

It was the only technological tool widely and continuously used for over three centuries. For math and science geeks it was a badge of honor, nestled neatly into a plastic pocket protector along with ...

The protractor and the Bunsen burner. Playing the recorder in music class. Drawing arcs and circles with a compass in geometry. These tools of the education trade become part of our lives for a ...

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