Detail of the 54th plate from Karl Bernhard Lehmann’s and Rudolf Otto Neumann’s ”Atlas und Grundriss der Bakteriologie und Lehrbuch der speziellen bakteriologischen Diagnostik” (1897), published by William Wood & Co (New York), showing a gelatin stick culture of Vibrio albensis grown for 24 hours (I), 4 days (II) and 10 days (III) at 22°C as well as an indol reaction at the end of the 10 day incubation (bouillon culture treated with dilute sulphuric acid). The image was retrieved via Flickr from the Biodiversity Heritage Library (image modified by MIC). The cover is published under the Creative Commons Attribution (CC BY) license.