- The Polar and Tropical Worlds: A Description of Man and Nature in the Polar and Equatorial Regions of the Globe
- Volcanoes and Earthquakes
- The Sea and Its Living Wonders: A Popular Account of the Marvels of the Deep and of the Progress of Maritime Discovery From the Earliest Ages to the Present Time
- Die Tropenwelt im Thier- und Pflanzenleben.
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