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A Method for Grinding Lenses to See the Unseen Galileo Galilei

I present here a guide to fashioning a simple lens, the very heart of the telescope with which I first witnessed the moons of...

A Method for Grinding Lenses to See the Unseen Galileo Galilei

I present here a guide to fashioning a simple lens, the very heart of the telescope with which I first witnessed the moons of...