Abstract Harry Conrad Rippel (1926-2004) worked as a principal engineer at Franklin Institute Research Laboratory from 1952 to 1984 and was a leading authority on tribology, the study of friction, wear, lubrication, and the design of bearings. He studied mechanical engineering at Drexel Institute of Technology, graduating with a bachelor’s degree in 1952 and then a master’s degree in 1957. This collection contains the academic, professional, and personal papers of Mr. Rippel, spanning from 1943-2004,...

Overview Contains the papers of Edward R. Snader, Sr. and his son Edward R. Snader, Jr., including diplomas, photographs, books (text, tribute, notebook), lecture notes and pamphlets. Dr. Edward Snader Sr. [1855-1909] graduated from Hahnemann Medical College in 1884, and went on after his graduation to become Chief of the Dispensary Staff at Hahnemann Medical College. He was also a professor of diagnosis at Hahnemann Medical College. Dr. Edward R. Snader Jr. [1895-1942] graduated from Hahnemann...