Title: John Dalton
Content:  John Dalton (6 September 1766 – 27 July 1844) was an English chemist, physicist and meteorologist. He is best known for introducing the atomic theory into chemistry, and for his research into colour blindness, sometimes referred to as Daltonism in his honour.
Title: John Call Dalton
Content:  Dalton was born in Chelmsford, Massachusetts. He studied under French physiologist Claude Bernard in France. Dalton had two understudies: John Green Curtis and William Stewart Halsted. Dalton and Curtis were associated with the Columbia University College of Physicians and Surgeons in New York. Dalton was a professor of physiology at the college; however, it is unclear whether his son was as well. Dalton received his undergraduate and medical degrees from Harvard University.
Title: John Dalton
Content:  When he was 15, Dalton joined his older brother Jonathan in running a Quaker school in Kendal, Westmorland, about 45 mi from his home. Around the age of 23, Dalton may have considered studying law or medicine, but his relatives did not encourage him, perhaps because being a Dissenter, he was barred from attending English universities. He acquired much scientific knowledge from informal instruction by John Gough, a blind philosopher who was gifted in the sciences and arts. At 27, he was appointed teacher of mathematics and natural philosophy at the "Manchester Academy" in Manchester, a dissenting academy (the lineal predecessor, following a number of changes of location, of Harris Manchester College, Oxford). He remained for seven years when the college's worsening financial situation led to his resignation. Dalton began a new career as a private tutor in the same two subjects.
Title: John Call Dalton
Content:  John Call Dalton (February 2, 1825 – February 12, 1889) was an American physiologist and vivisection activist who became the first full-time professor of physiology in the United States.
Title: John Call Dalton
Content:  Dalton was a staunch supporter of vivisection. He conducted experiments on living animals at the University of Buffalo and promoted vivisection to medical schools throughout the United States. In 1866, he authored Vivisection: What It Is and What It has Accomplished for the New York Academy of Medicine. It summarized the benefits of vivisection.
Title: John Dalton
Content:  he was proposed without his knowledge, and on election paid the usual fee. Six years previously he had been made a corresponding member of the French Académie des Sciences, and in 1830 he was elected as one of its eight foreign associates in place of Davy. In 1833, Earl Grey's government conferred on him a pension of £150, raised in 1836 to £300. Dalton was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1834. A young James Prescott Joule, who later studied and published (1843) on the nature of heat and its relationship to mechanical work, was a pupil of Dalton in his last years.
Title: John Call Dalton
Content:  The anatomy of the brain was primarily drawn by Europeans prior to Dalton's more detailed and precise sketches of the brain. Dalton received an award from the American Medical Association in 1851 for his essay "Corpus Luteum". He was a professor at the University at Buffalo for a brief time, but resigned in 1854. Dalton served as a professor or chairperson at the Vermont medical college and the Long Island College Hospital. John became the president of the College of Physicians and Surgeons in 1884. Dalton served as a surgeon in the national service during the American Civil War from 1861 
Title: John Dalton
Content:  Dalton published papers on such diverse topics as rain and dew and the origin of springs (hydrosphere); on heat, the colour of the sky, steam and the reflection and refraction of light; and on the grammatical subjects of the auxiliary verbs and participles of the English language.
Title: John W. Daly
Content:  John William Daly (June 8, 1933 – March 5, 2008) was an American biochemist who performed research for nearly 50 years at the National Institutes of Health in Bethesda, Maryland. A primary focus of his research included the discovery, structure elucidation, synthesis, and pharmacology of alkaloids and other biologically active natural products. He was the world's leading authority in amphibian alkaloids and an expert in many areas of natural products. Daly was a prolific writer, producing around 700 papers, including books and chapters. In 1997 he was elected to the U.S. National Academy of Sciences.
Title: John Dalton
Content:  Dalton never married and had only a few close friends. As a Quaker, he lived a modest and unassuming personal life. For the 26 years prior to his death, Dalton lived in a room in the home of the Rev W. Johns, a published botanist, and his wife, in George Street, Manchester. Dalton and Johns died in the same year (1844). Dalton's daily round of laboratory work and tutoring in Manchester was broken only by annual excursions to the Lake District and occasional visits to London. In 1822 he paid a short visit to Paris, where he met many distinguished resident men of science. He attended several of the earlier meetings of the British Association at York, Oxford, Dublin and Bristol.

Question: what did john dalton study?
Answer: Chemist.