Age
any period of time attributed to something as the whole, or part, of its duration: as the age of man, the several ages of the world, the golden age. In Physiology.-If the word age be ages of the world, the golden age.
In Physiology. If the word age be used to denote one of the stages of human life, then physiology clearly distinguishes six of these: viz., the periods of infancy, girlhood, of life, then physiology clearly distinguishes six of these: viz., the JEAN LOUIS RODOLPHE AGASSIZ of childhood, of boyhood or g of childhood, of boyhood or girlhood, of adolescence, of manhood or womanhood, and of old age. The period of infancy terminates at 2, when the first dentition is completed; that of childhood at 7 or AGASSIZ, JEAN LOUIS RODOLPHE, a Swiss naturalist, born at Môtier, Swit zerland, May 28, 1807. He studied med work that of boyhood or girlhood at the comicine and comparative anatomy in the universities of Zürich, Heidelberg, and the male and from the 12th to the 14th Munich. He gave many years to study 8, when the second dentition is finished; of fossil fishes, and his first great work bore that title (1834). His next special mencement of puberty, in temperate cliresearches were directed toward the mates from the 14th to the 16th year in zerland, May 28, 1807. He studied med- icine and comparative anatomy in the universities of Zürich, Heidelberg, and Munich. He gave many years to study to the 24th year in the male and the 20th the United in the female; that of manhood or womanhood stretches on till the advent of old "Studies of Glaciers" (1844). In 1846 stitution in each individual and the he made a lecturing tour of the States, and, in 1848, became Professor of Geology at Harvard, and, in 1859, curator of the Museum of Comparative age, which comes sooner or later, accordof fossil fishes, and his first great work bore that title (1834). His next special researches were directed toward the explanation of glaciers, and he published "Studies of Glaciers" (1844). In 1846 hood stretches on till the advent of old age, which comes sooner or later, accord- ing to the original strength of the con- stitution in each individual case, and the habits which have been acquired during of natural science in his special depart- life. The precise time of human ex ments are very numerous and of highest istence similarly varies. authority. Chief among his works written in English are "Principles of Zoölogy;" "The Structure of Animal Life"; "Scientific Results of a Journey in Brazil"; "Natural History of the Fresh- Water Fishes of Europe"; and "Contributions to the Natural History of the United States." Other important works are "Studies on the Glaciers," "The of natural science in his special depart- ments are very numerous and of highest authority. Chief among his works writsil Fishes." He died at Cambridge, Mass., Dec. 14, 1873.