 In 1910 Zuntz participated in a scientific expedition to Pico de Teide in the Canary Islands with Schrötter and physiologists Arnold Durig (1872-1961) and Joseph Barcroft (1872-1947).He published a number of articles on high-altitude medicine, and one of his better known works was "Höhenklima und Bergwanderungen in ihrer Wirkung auf den Menschen" (High-Altitude Climate and Mountaineering and their Effect on Humans).In 1885 with August Julius Geppert (1856-1937), he created the Zuntz-Geppert respiratory apparatus, and for field studies Zuntz invented a portable "Gasuhr" (dry gas measuring device).