This book, "Growth hormones in plants. Authorized English translation of Die wuchsstofftheorie und ihre bedeutung fur die analyse des wachstums und der wachstumsbewegungen der pflanzen. 2", by Peter Boysen-Jensen, is a replication of a book originally published before 1936. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.