 In 2002, the institution received another gift from Roy Eddleman, founder of Spectrum Laboratories, whose collection contained paintings from the 17th, 18th, and 19th centuries.Together, the two collections contain more than 90 paintings and 200 works on paper illustrating the work of alchemists and their influence on the development of chemistry as a science.The Chemical Heritage Foundation's collections include such pioneering and landmark instruments as a 1934 Beckman Model G pH Meter, a DuPont 900 Differential Thermal Analyzer, an early custom Electro-spray Ionization Mass Spectrometer used by John B. Fenn, a 1947 Mettler B5 Single-Pan Balance, a 1963 Perkin-Elmer Model 125 Infrared Grating Spectrophotometer, and a c. 1980's Automated Peptide Synthesizer created by Bruce Merrifield.