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Learning Resources

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Logarithmic Slide Rule
Machine of the Month

Logarithmic Slide Rule

Let’s assume that you haven’t ever considered how to make a slide rule.  We have a machine at the Museum that did make them. It worked for the Keuffel & […]

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Bentley Engine
Machine of the Month

Bentley Engine

The Machine of the Month for June 2021 is the Bentley engine, c. 1930.

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What the Bricks Tell Us
Multimedia Resources

What the Bricks Tell Us

Examining the brickwork of the museum’s historic building reveals evidence of structural changes. What does the building’s exterior tell us?

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Measuring with Shadow
Activity

Measuring with Shadow

How can you measure the width between screw threads? One way is with a machine is called an Optical Comparator. It was developed by James Hartness & Russell Porter, who […]

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Water Power
Multimedia Resources

Water Power

In 2007, the American Precision Museum engaged the Historic American Engineering Record (HAER) in Washington DC to document the remains of the waterwheel pit and millworks at the 1846 Robbins […]

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