Mathematics:
Bottom line on the stamp translates to “The 10 mathematical formulas that changed the face of the earth”.
The equations of Boltzmann describe how the behavior of gasses depends on the constant movement of atoms and molecules. Their great importance is inherent in an important paper in which the applications of gasses is explained: in engines that use vapor and internal combustion; in countless reactions among gasses used by chemists for modern medicine, plastics, and other substances; to understand time; and to explain violent processes of the sun, starts, and distant galaxies.
Physics, Aerodynamics, Climatology and Meteorology:
Chemistry, Engineering:
Alfred Bernhard Nobel was a Swedish chemist, engineer, inventor, businessman, and philanthropist. He is known for creating dynamite as well as having bequeathed his fortune to establish the Nobel Prize. He also made several important contributions to science, holding 355 patents in his lifetime.
Chemistry, Biology, Engineering, Informatics:
Ludwig Philipp Albert Schweitzer OM was an Alsatian polymath. He was a theologian, organist, musicologist, writer, humanitarian, philosopher, and physician.Â
Physics, Astronautic Engeneering:
Konstantin Eduardovich Tsiolkovsky was a Russian and Soviet rocket scientist who pioneered astronautics.Â
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Postcards Etc 
Wow you have certainly cover a lot of the branches of the sciences. Always interesting to see how stamp designers visually interpret maths on stamps
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Very different stamps/sciences. I love especially the details, like the illustration on the frist one, and Nobel’s labortory.
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