![]() He proved his theory to be true when genetic analysis of his own eye tissue revealed that he was missing the photoreceptor for perceiving the color green. Since the condition had affected both him and his brother since birth, Dalton theorized that it must be hereditary. ![]() ![]() His research findings on atmospheric pressure were published in his first book, Meteorological Findings, the year he arrived in Manchester.ĭuring his early career as a scientist, Dalton also researched color blindness-a topic with which he was familiar through firsthand experience. He started keeping daily logs of the weather, paying special attention to details such as wind velocity and barometric pressure-a habit Dalton would continue all of his life. For one of his first research projects, Dalton pursued his avid interest in meteorology. Membership granted Dalton access to laboratory facilities. While at New College, Dalton joined the Manchester Literary and Philosophical Society. He remained there until 1793, at which time he became a math and philosophy tutor at the New College in Manchester. Within four years, the shy young man was made principal of the school. When he was 14, he spent a year working as a farmhand but decided to return to teaching - this time as an assistant at a Quaker boarding school in Kendal. It was clear that he would need to help out with the family finances from a young age.Īfter attending a Quaker school in his village in Cumberland, when Dalton was just 12 years old he started teaching there. As a child, Dalton longed for formal education, but his family was very poor. Dalton's father earned a modest income as a handloom weaver. Both he and his brother were born color-blind. Early Life and Careerĭalton was born in Eaglesfield, England, on September 6, 1766, to a Quaker family. Also in the 1800s, he was the first scientist to explain the behavior of atoms in terms of the measurement of weight. In 1803 he revealed the concept of Dalton’s Law of Partial Pressures. During John Dalton's early career, he identified the hereditary nature of red-green color blindness.
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