- Historical Chemistry
- Rediscovery of the Elements
Research
                              
                              Dr. Marshall researches the history of the discovery of the elements. His studies
                                 carry him to over 20 countries where he photographs and documents specific sites which
                                 he describes in his publications on chemical history.
                              
                              "Discovery of the Elements," a book covering the history of the discovery of the elements from the ancients to
                                 modern times.
                              
                              "Walking Tour of the Elements," a CD describing all of the elements, a complete collection at UNT, including the
                                 minerals of original discovery.
                              
                              "Rediscovery of the Elements," allowing one to visit all of the discovery sites of the elements.
                              
                              Dr. Marshall's obituary
                              
                              Dr. Marshall's rediscovery of the Elements articles: