SOIL ANALYSIS OF COASTLINE BY ELECTRONIC DEVICE
Using the latest type of electronic equipment, officers of the Department of Scientific and Industrial Research carried out a test of the soil near the Wanganui Airport last week. Similar tests are being conducted along the coast in other parts of the North Island.
A bore was made to a depth of more than 35 feet by a drill operated from a portable derrick. Charges of explosives were then lowered and fired, the sound waves being recorded by electronic equipment on a graph. So sensitive was the equipment in use that a man walking on the aerodrome some 200 yards away created a disturbance and he had to be stopped. A motor car moving some distance away also was picked up by the equipment. The Department of Scientific and Industrial Research is later able to make an analysis of the soil content by an interpretation of the graph of the vibrations.
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Wanganui Chronicle, 31 May 1949, Page 4
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158SOIL ANALYSIS OF COASTLINE BY ELECTRONIC DEVICE Wanganui Chronicle, 31 May 1949, Page 4
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