SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Editorial use only.
Nikolay Zelinsky (middle row, second from the right) and academic colleagues. Nikolay Dimitrievich Zelinsky (1861-1953), was a Russian-Soviet chemist. He was one of the founders of the theory of organic catalysis. He invented the first filtering gas mask, using activated charcoal, in 1915.
Model release not available. Property release not required.