homoeopathic law of similarity The homoeopathic law of similarity. An open letter to Professor Justus Baron v. Liebig. This book, "The homoeopathic law of similarity", by Eduard von Grauvogl, is a replication of a book originally published before 1879. 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.