Dr. Adolphus Lippe was a prominent homeopathic physician who practiced from 1841 until his death in 1888. Born in Germany, Dr. Lippe immigrated to the United States to learn medicine and graduated from the North American Academy of Homeopathic Medicine in 1841. After graduating, Dr. Lippe practiced across western and central Pennsylvania, eventually settling in Philadelphia. In Philadelphia, Dr. Lippe practiced, and also lectured on Materia Medica at the Homeopathic Medical College of Pennsylvania. He would later become chair of Materia Medica there from 1864 to 1869. Dr. Lippe died in Philadelphia on January 23, 1888, after decades of dedicated work in homeopathy. The Adolph Lippe collection consists primarily of letters and correspondence. The majority of the material concerns official day to day administrative tasks at the Homeopathic College of Pennsylvania. This includes letters written by him, addressed to him, and involving him. The majority of the material is centered on the period from 1856-1869, and there are very few items outside of that date range. This collection is valuable to researchers studying the administrative workings of homeopathic institutions in the mid-19th century as well as specifically at the Homeopathic Medical College of Pennsylvania.