Finding Aids

This collection consists of the business records of Ernest Dichter and the several consulting firms through which he operated fully document his role as a pioneer of motivational research, from the beginnings of his career in the United States until a few months before his death.

By the beginning of the nineteenth century, Pennsylvania was already a leader in the coal, iron, steel, railroad, and petroleum industries. As the manufacturing industries grew in the cities, so did the small businesses of craftsman and artisans that populated the surrounding areas selling their goods. These merchants played an important role in trade, community relationships, and the economy.  This is an artificial collection of account books, cash ledgers, and receipt books of nineteenth-century merchants of various industries in Pennsylvania. Minimal correspondence is included as well as a poem.  Mineral, iron and leather industries are represented as well as organ building which includes two treatises written in German.  

Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. In 1802, he held various government posts under Napoleon Bonaparte (1769-1821). In 1803, he aided President Thomas Jefferson (1743–1826) in negotiations for the Louisiana Purchase, a land deal transferring ownership of more than 530 million acres of territory to the United States from France. The principal item of this collection is a letter to James Monroe, minister plenipotentiary to negotiate the Louisiana Purchase, dated May 7, 1803. The letter is encased in a leather bound portfolio containing the original handwritten French letter, a typed English translation, and three other items.

Wilhelm Melas (1869-1916) was an engineer and inventor who specialized in the design of furnaces and other industrial machines. He designed plant and foundry layouts, as well as developed materials for railroad stations. This collection consists of more than 700 drawings related to Melas’ work as an engineer, as well as a compilation of project notes, reference material, and data. This collection would be useful to researchers interested in industrial design, especially related to steel and iron production.