Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hushing is an ancient and historic mining method using a flood or torrent of water to reveal mineral veins. The method was applied in several ways, both in prospecting for ores, and for their exploitation. Mineral veins are often hidden below soil and sub-soil, which must be stripped away to discover the ore veins. A flood of water is very effective in moving soil as well as working the ore deposits when combined with other methods such as fire-setting. It was used during the formation and expansion of the Roman Empire from the first century BC on to the end of the empire. It was also widely used later, and apparently survived until modern times where the cost of explosives was prohibitive. It is more commonly used in a variant known as hydraulic mining, where jets or streams of water are used to break down deposits, especially of alluvial gold and alluvial tin.

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