American chemist born on May 3, 1844 in Johnsburg, in the State of New York, and died in Middletown, Connecticut, in 1907.
He studied at Wesleyan University in Connecticut. His doctoral thesis, which tried to chemical methods applied to the development of agriculture, was read at Yale University in 1869. After postdoctoral studies in Germany at the universities of Berlin and Leipzig, he/she returned to College Wesleyan as a Professor of chemistry, position he/she retained until his death. In 1875, he/she managed to persuade the Government of the State of Connecticut to open the first agricultural research station. Four years later, the Congress of the United States, on his request, established a network of stations, and appointed director Atwater's Office of experiment stations. In collaboration with the physical e. B. Rosa, built a special calorimeter with which managed to prove that the animals are also complied with the principle of conservation of energy, and that it also used to measure the caloric power of food. Its tables, the first of its kind, were published in 1896.