von Mohl developed the idea that the nucleus of the cell was within the granular, colloidal material that made up the main substance of the cell. In 1846 he named this substance protoplasm
Hugo von Hofmannsthal was born on February 1, 1874 and died on July 15, 1929. Hugo von Hofmannsthal would have been 55 years old at the time of death or 138 years old today.