Geophysicists W. E. Hall, R. L. McHenry and F. A. McNeill perform an electrical resistivity survey with a ratiometer near Reefton in 1937. The process was part of a search for gold-bearing quartz reefs that might then be mined.
Te whakamahi i tēnei tūemi
Private collection, Maxwell Gage
Photograph by Maxwell Gage
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