German dentist (1840–1902)
Julius Bruck (October 6, 1840 – April 20, 1902) was a German dentist who was a native of Breslau.
He studied dentistry and medicine at the Universities of Breslau, Berlin, Bonn and Paris; obtaining a degree in dentistry from Berlin in 1858. Afterwards he worked as an assistant to his father, Jonas Bruck (1813-1883) in Breslau. In 1871 he became privat-docent at the University of Breslau, and in 1891 was awarded with an honorary professorship.
In 1867 Bruck designed a water-cooled diaphanoscopic instrument for translumination of the bladder via the rectum. This instrument consisted of an illuminated platinum thread inserted into a double glass wall cylinder with the instrument's outer glass chamber cooled by water.