Preceptors in chemistry Introduction to Preceptors in chemistry Herman Boerhaave and the use of demonstration experiments in chemistry courses A non publishing preceptor published : the three editions of Joseph Blacks Elements of chemistry William Henry and The elements of experimental chemistry Mrs. Jane Marcet and Conversations in chemistry Justus von Liebig : chemical mentor and teacher Insights into the chemical and pedagogical philosophy of Stanislao Cannizzaro from his Faraday lecture Mendeleev and the chemistry textbook in Russia Fred Basolo and the (re)naissance of American inorganic chemistry Linus Pauling : the right to be wrong Concluding reflections for Preceptors in chemistry