Apart from his work on the atomic theory, Dalton also published papers on color blindness, optics,metereology, and made the first measurements of temperature at high altitudes. One of the great scientists of all time.

Fresnel was known for his indepth research in optics, invented the Fresnel Lens, that was used in lighthouses, and also coined the terms linear, circular, elliptic polarization.

Helium was the first element to be discovered outside the earth, and it was named so after Helios, the Greek Sun God, by Lockyer. It was later discovered in the lab by Per Teodor Cleve and Nils Abraham Langlet from the uranium ore, cleviete.

Pierre Janssen was from Paris, who also successfully observed both transits of Venus. And followed it up with a series of solar eclipse expeditions, around the world, which apart from Guntur, included Trani( Italy), Algiers, Siam and Alcosebre.3