The direct action of atropine, homatropine, hyoscine, hyoscyamine, and daturine on the heart of the dog, terrapin, and frog This book, "The direct action of atropine, homatropine, hyoscine, hyoscyamine, and daturine on the heart of the dog, terrapin, and frog", by Henry G. Beyer, is a replication of a book originally published before 1886. 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.