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1 (of 3) Nobel Laureate Hugo Theorell with an automatic Geiger-Müller counter for detecting radioactivity. The counter was constructed at Karolinska Institutet.

Copyright © Karolinska Institutet Photographer unknown

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2 (of 3) Nobel Laureate Hugo Theorell with the "home-made" magnetic weighing machine that was constructed at Karolinska Institutet.

Copyright © Karolinska Institutet Photographer unknown

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3 (of 3) Nobel Laureates in Physiology or Medicine at Karolinska Institutet. From left: Ulf von Euler, Hugo Theorell and Ragnar Granit.

Copyright © Lennart Nilsson