(Baba the twelfth lunar month 22), January 13, 1870, the American biologist Harrison was born.

1870, 13, 2009, the American biologist Harrison was born. In 1907, Harrison successfully cultured tadpole tissue and nerve fibers grow from the organization. This experiment not only introduced to the study of the cytology observed in vivo, and also solve the origin and nature of the debate on nerve fibers.