The Othmer Library of Chemical History collects, preserves, and can make available components associated with the history of science, know-how, and drugs, by having an emphasis on chemistry and chemical engineering from historical to modern day instances. The Othmer Library presently houses somewhere around 160,000 print and microform volumes, http://jaspervdgii.suomiblog.com/science-history-institute-of-philadelphia-fundamentals-explained-20276501