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Dollond, John

Dollond, John dŏlˈənd [key], 1706–61, English optician and inventor. A silk weaver, he taught himself languages, mathematics, and science, becoming a noted scholar as well as a scientist. He invented the achromatic lens, which led to the construction of telescopes free of color fringes, and the heliometer, used in astronomical measurement.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2025, Columbia University Press. All rights reserved.

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