Image: Three middle-aged Caucasian men in mid-20th century suits examine a piece of scientific apparatus on a table
Professor A.E.V. Richardson (right), discusses an experiment at the Waite Agricultural Institute, c. 1940
Citation

Image courtesy of the State Library of South Australia, SLSA: B 61587, http://collections.slsa.sa.gov.au/resource/B+61587, Public Domain