John Dollond
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John Dollond was an English optician known for his successful optics business and his patenting and commercialization of achromatic doublets.
Portrait by Benjamin Wilson, c. 1760
Samuel Klingenstierna
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Samuel Klingenstierna was a Swedish mathematician and scientist. He started his career as a lawyer but soon moved to natural philosophy. As a student he gave lectures on the then novel mathematical an
John Dollond
…on statements made by Sir Isaac Newton, Dollond first disputed this possibility (Phil. Trans., 1753), but subsequently, after the Swedish physicist, Samuel Klingenstierna (1698–1765), had pointed out that Newton's law of dispersion did not harmonize with certain observed facts, Dollond began experiments to settle the…
Samuel Klingenstierna 1849