Image
Compressed-air machines like this one were used to cut coal from the seam.
Te whakamahi i tēnei tūemi
Alexander Turnbull Library, J. R. Wall Collection
Reference: 1/1-013014; F
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.