In 1904, Professor Moritz Benedikt of Vienna treated the whole question in his book, _Crystallization and Morphogenesis_, of which a French translation appeared in the Maloine Library. This book is full of original and suggestive ideas; it describes the work of Harting, and more especially that of Van Schroen, who considers that crystals like living beings begin as a cell and grow by a process of intussusception. Professor Benedikt has made a complete resume of the question in an article, "The Origins of the Forms of Life," which appeared in the _Revue Scientifique_ in 1905. In 1904, Professor Dubois of Lyons presented a report to the Society of Biology on his interesting experiments on mineral cytogenesis. The same year he gave a discourse at the university of Lyons on "The Creation of Living Beings," which has been published by A. Storck of Lyons. One of the most active of the modern morphogenists is Professor Herrera of Mexico, whose work is illustrated in the _Atlas de Plasmogenie_ by Dr. Jules Felix of Brussels, one of the most enthusiastic disciples of the new science. There is a resume of Herrera's work in the _Memoirs of the Societe Alzate, Mexico_. A bibliography of the works which have appeared on this subject may be found in the book of Professor Rhumbler of Goettingen, _Aus dem Lueckengebiete zwischen Organischer und Anorganischer Materie_, 1906. In 1907, Dr. Luiz Razetti of Carracas published a magnificent study of the subject under the title _Que es la vida_. In 1907, Dr. Martin Kuckuck of St. Petersburg repeated and extended the experiments of R. Dubois, and published his results under the title _Archigonia, Generatio Spontanea_, Leipzig, Ambrosius Barth. Butler Burke of Cambridge has also made a series of experiments with radium and barium salts analogous to those of Dubois. In 1909, Albert and Alexandre Mary of Beauvais published {122} an interesting study of this question under the title _Etudes experimentales sur la generation primitive_, published by Jules Rousset. I should mention also among the works of synthetic biology the publications of Professor Otto Lehmann of Karlsruhe, and in particular _Fluessige Krystalle und die Theorien des Lebens_, Leipzig, Ambrosius Barth. Professor Ulenhuth of Berlin has published his study on the osmotic growth of iron in alkaline hypochlorites under the title _Untersuchungen ueber Antiformin_, Berlin, Julius Springer. Professor Gariel has made a series of researches on osmotic growth which are published in Abraham's _Recueil d'experiences de physique_. A. Lecha Marzo of Valladolid published his researches on the growth of aniline colours in the _Gaceta Medica Catalana_, 1909, under the title _Otra nueva flora artificiale_. Dr. Maurice d'Halluin of Lille has also published a volume on osmotic growths under the title, _Stephane Leduc a-t-il cree la vie?_