A New Device for Locating Hidden Pipes
Description:
Reprinted article describing a device that detects buried or hidden pipes based on magnetic deflection, by reducing the control effects of the earth's magnetic field. It includes photographs of the device and its use, as well as data graphs. Some text is underlined in red and blue, and there is a pencil sketch at the very end.
Date:
1935
Creator:
Hoare, S. C.
Item Type:
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Pamphlet