of De Antholysi Prodromus. It was devoted to morphology — mainly to the structure of monstrosities and aberrant forms of plants — and was illustrated by five plates of figures drawn and transferred to the lithographic stone by the author's own hand. Its subject was so directly in line with that of a treatise on the metamorphosis of plants by Johann Wolfgang von Goethe that it was heartily welcomed by the poet-philosopher, whose own life was then approaching its close. Having received Engelmann's treatise through his correspondent Marianne von Willemer, Goethe inquired after the young author, saying that Engelmann had completely apprehended Goethe's ideas concerning vegetable morphology, and had shown a peculiar genius for their development. So strong was his confidence in Engelmann's ability that he offered to give him his whole store of unpublished notes and sketches. In 1832 Engelmann went to Paris, where he again became associated with Braun, and also with Louis Agassiz. Emigration to United States Wishing to visit America, he accepted a proposition from his uncles to become their agent for the purchase of lands in the United States. In September 1832, he sailed from Bremen for Baltimore, Maryland. In addition to his duties assessing land investment opportunities, he also spent time on botanical travels, first visiting Thomas Nuttall in Philadelphia. He then went to St. Louis, Missouri, and from there around to the adjacent states. He settled with his relatives and the lawyer Gustav Koerner on a farm in St. Clair County, Illinois near Belleville for three years. For the purpose of forming a correct judgment of the lands of the new country to which he had come, he made many long, lonesome, and often adventurous horse-back journeys in Illinois, Missouri, and Arkansas. He often suffered sickness and hardship upon those journeys, but he persevered until he finished all the business he had planned to do. He made much use of his scientific, as well as practical, knowledge in the prosecution of that business, doing mineralogical and geological work, but only the botanical notes which he then made were used in his subsequent scientific career. Medical practice Having completed his business engagement, in the autumn of 1835 Engelmann moved to St. Louis and established a medical practice. During the three years that had passed since he left his native land the slender means he brought with him became exhausted, and he began the practice