![Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen. Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.](http://darwin-online.org.uk/converted/scans/1876_VoyageDanish_F174(online)/1876_Voyage_F174_272.jpg)
Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.
![Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish) Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)](https://cloudfront.jove.com/files/ftp_upload/61316/61316fig5v2.jpg)
Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)
![Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish) Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)](https://cloudfront.jove.com/files/ftp_upload/61316/61316fig04.jpg)
Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)
![Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish) Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)](https://cloudfront.jove.com/files/ftp_upload/61316/61316fig3v2.jpg)
Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)
![Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen. Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.](http://darwin-online.org.uk/converted/scans/1876_VoyageDanish_F174(online)/1876_Voyage_F174_605.jpg)
Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.
![Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen. Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.](http://darwin-online.org.uk/converted/scans/1876_VoyageDanish_F174(online)/1876_Voyage_F174_418.jpg)
Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.
![Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish) Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)](https://cloudfront.jove.com/files/ftp_upload/61316/61316fig01.jpg)
Establishment and Maintenance of Gnotobiotic American Cockroaches (Periplaneta americana) | Protocol (Translated to Danish)
![Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen. Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.](http://darwin-online.org.uk/converted/scans/1876_VoyageDanish_F174(online)/1876_Voyage_F174_116.jpg)
Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.
![Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen. Darwin, C. R. 1876. Rejse om Jorden. Populære Skildringer. Translated by Emil Chr. Hansen and Alfred Jørgensen. Copenhagen: Salmonsen.](http://darwin-online.org.uk/converted/published/1876_VoyageDanish_F174/1876_VoyageDanish_F174_fig001.jpg)