Dr. Theodore S. Geiger was a student at the Homeopathic Medical College of Pennsylvania from 1852 to 1854, and almost nothing is known about him or his life. He was from Manchester, Maryland, graduated from the Homeopathic Medical College of Pennsylvania in 1854, and alumni records indicate he died in 1863. His nephew Dr. Edmund Geiger Shower, whose materials can also be found in this collection, was also a homeopathic physician and graduated from the Homeopathic Medical College of Pennsylvania in 1878. He was also from Manchester, Maryland but settled in Franklin County, Pennsylvania after graduating in 1878. Despite the name of the Theodore Geiger Class Notes Collection, the material included goes far beyond Dr. Geiger and a large portion of this collection also belongs to Dr. Shower. The material in this collection includes Dr. Geiger’s class notebooks dating from 1853 and 1854, as well as Dr. Shower’s reference materials dating from 1876. There are also numerous miscellaneous photocopied documents from the family, medical instruments, and other documents in this collection. Despite its wide range of topics, this collection would be very useful for researchers studying the curriculum and everyday classes of The Homeopathic Medical College of Pennsylvania, and what homeopathy students at the college and in general were studying during the 1850s. It would also be very useful for researchers studying what homeopathic physicians were referencing at the time, as well as how homeopathic physicians were creating and mixing their prescriptions and what was going into them.