Mountain Goat Reverse Helix Trommel for gold mining prospecting teknetics slow down your swirling rhythm

slow down your swirling rhythm so that only a small amount flies out with each swirl

It can also be used directly in a stream

plus a mesh one that’s perfect for your water bottle

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Mountain Goat Reverse Helix Trommel for gold mining prospecting teknetics slow down your swirling rhythmThe Mountain Goat Trommel is a reverse helix system built on the same principle as the huge mining trommels used by large mining companies all over the world, but this is light and portable. The reverse helix system came from the Archimedes Screw Pump invented over 2,000 years ago by the mathematician Archimedes. The Mountain Goat is efficient because the spiral riffles inside of the tube turn and bring the heavy materials up to the high end of the