A manual of biological therapeutics. Sera, bacterins, phylacogens, tuberculins, glandular extracts, toxins, cultures, antigens, etc (1914). This book, "A manual of biological therapeutics", by Davismpany Parke, is a replication of a book originally published before 1914. 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.