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Mine survey work that formerly took three or four months of labor with between 20 and 30 men now can be done in two to three hours with a helicopter. (...)
Mine survey work that formerly took three or four months of labor with between 20 and 30 men now can be done in two to three hours with a helicopter. (...)

Mine survey work that formerly took three or four months of labor with between 20 and 30 men now can be done in two to three hours with a helicopter. (...)

Date6/5/1945
Names
Format
Notes
Original Toronto Star caption: Mine survey work that formerly took three or four months of labor with between 20 and 30 men now can be done in two to three hours with a helicopter. Hans Lunenberg; Toronto mining engineer; devised the procedure for making surveys from the cabin of the plane. He is shown here holding the wheel of the helicopter as it hovers motionless over his head.
Language
ProvenanceFrom the Toronto Star Archives
Usage Rights Public Domain (Learn More)
Call Number / Accession NumberTSPA_0003516F