Two essential globe-making tools

The first tool is a highly accurate square. My square has been calibrated and is accurate to -.0007 inside and -.0002 outside. That’s about as accurate as you can get. The second tools is a micrometer. My micrometer will measure to an accuracy to 0.001. The only thing better than that would be a laser-assisted device, which is not necessary.

Essential globe-making tools
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