The relation of the health of the host and other factors to infection of Apium graveoleus by Septoria appii This book, "The relation of the health of the host. and other factors to infection of Apium graveoleus by Septoria appii", by Harvey Earl Thomas, is a replication of a book originally published before 1921. 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.