Other Collections Dried Specimens A dried specimen contains soft tissue that is usually preserved with a desiccating (drying) agent as well as chemicals and sometimes dyes. Corrosions A corrosion specimen is created when parts of a soft tissue specimen are injected with a special solution of metals, wax and dyes, and/or coated with a protective substance. Then the entire specimen is coated with a corrosive substance that dissolves the untreated portion of the specimen, leaving only the protected material behind. Lithics This word refers to any stone created by the human body, including kidney, bladder, and gallstones. Many lithics are on display and in storage in the Museum vaults, including some lithics that originated in our curator’s body. Historical Medical Photographs Since photography was invented in the mid-19th century, it has been used for medical purposes. Our collection of more than 1,200 photographs primarily showcases a variety of patients with diseases, injuries, and malformations, such as Civil War amputations, conjoined twins, and birth defects.