There is an ancient technique among loggers in American states. Those who have ever seen logs being transported by water, such as when logs are assembled from the forest where they were harvested and dropped into a river to swim down stream and then be lifted off at the factory, the technique is easy but very ingenious. An average guy would not transport more that ten in a day, for most will lie across the wrong way, others will block the flow, others will get out of the water and mostly, others will assemble together and then stop somewhere creating a dam.

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