Hans Geiger was the German inventor of the Geiger counter, which detects radiation. He is shown here in a laboratory at Manchester with Ernest Rutherford (right), the New Zealand scientist who split the atom. In the 1940s Ernest Marsden, a former student of Rutherford and colleague of Geiger, initiated a search for uranium in New Zealand.
Te whakamahi i tēnei tūemi
Permission of the Alexander Turnbull Library, National Library of New Zealand, Te Puna Mātauranga o Aotearoa, must be obtained before any re-use of this image.