Peter Barlow and the Barlow Lenses
On October 13, 1776, British mathematician and physicist Peter Barlow was born. He is still reknown today for his development of two varieties of achromatic (non-colour-distorting) telescope lenses, the so-called Barlow lenses. Opinions derived from long experience are exceedingly valuable, and outweigh all others, while they are consistent with facts and with each other; but they are worse than useless when they lead, as in this instance, to directly opposite opinions. – Peter…
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