The Nuttall Encyclopedia
Zimmermann, Johan Georg von
Swiss physician, born at Brugg, in the canton of Bern; studied at Göttingen, became the friend of Haller (q. v .), and settled down to practice in his native town, where he continued 16 years, very successful both in medicine and literature, but "tormented with hypochondria," and wrote his book on "Solitude," which was translated into every European language; wrote also on "Medical Experiences," a famed book in its day too, also on "National Pride," and became "famed throughout the universe"; attended Frederick the Great on his deathbed, and wrote an unwise book about him, "a poor puddle of calumnies and credulities" (1728-1795). For insight into the man and his ways see Carlyle's "Frederick," a curious record.
Wood, James, ed. Entry for 'Zimmermann, Johan Georg von'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/z/zimmermann-johan-georg-von.html. Frederick Warne & Co Ltd. London. 1900.