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[[File:Double ring.JPG|thumb|Double ring]]
[[File:Double ring.jpg|thumb|Schematic diagram of double ring infiltrometer illustrating the infiltration of water both vertically, and laterally particularly from the outer ring.]]
[[File:Double ring.jpg|thumb|Schematic diagram of double ring infiltrometer illustrating the infiltration of water both vertically, and laterally particularly from the outer ring.]]
[[File:Bill's double ring.jpg|thumb|Double ring infiltrometer in use]]
[[File:Bill's double ring.jpg|thumb|Double ring infiltrometer in use]]