John Dalton was a famous chemist born in Eaglesfield, Cumbria, United Kingdom. He lived from 1766 to 1844. He was important because he developed a theory called Dalton's atomic theory. Dalton's atomic theory stimulated further research and fostered speculation about the structure of atoms. John Dalton was born into a Quaker family. His father was a weaver who did not earn much money, so John Dalton began working as a teacher in his village school at the age of twelve. After teaching for ten years at a school in Kendal, he turned to teaching at a college in Manchester. At college he joined the Manchester Literary and Philosophical Society. He became very interested in meteorology and began keeping daily weather records. He kept daily weather records until his death. He then also began writing articles and one of his articles was about the red-green color blindness that he and his brother both suffered from. He proved that this condition was hereditary and it is now called color blindness because of his findings. John Dalton proposed many ideas and theories. The one he is most...