Hahn, Pfarrers in Kornwestheim..._. Stuttgart: Mezler, 1774.
VON BERTELE, HANS. The development of equation clocks. _La Suisse Horologere_ (1959-1961), parts 1 through 5.
WENHAM, EDWARD. Tall case clocks. _The Antiquarian Magazine_ (May 1927), vol. 8, no. 4, p. 33. [The Borghesi clock is ill.u.s.trated only from a photograph of the Anderson Art Galleries in New York, and mislabeled "Astronomical Clock made in Jena, 1656, in elaborate mahogany case."]
U.S. GOVERNMENT PRINTING OFFICE: 1964
For sale by the Superintendent of Doc.u.ments, U.S. Government Printing Office Washington, D.C. 20402--Price 70 cents