Ask The Experts: What is a Spanish needle?
July 2017 by Chris Ralph
Some fellow in Texas was selling a Spanish needle—a dousing device used to recover minerals in the old days. Do you know anything about these?
Q: Where is the best place to prospect for gold in Minnesota?
Q: ...A number of scientific studies have been done that concluded our level of dredging is “not” harmful to fish or habitat. I suggest that the Mining Journal list some of these specific studies with brief summaries and conclusions.
What to do with black sands
Q: Conflicting advice on motorized small-scale mining equipment
Q: What's the difference between a header box and a crash box?
Options for affordable crushers for small mining operations
• Should I introduce mercury in the centrifugal bowl to aid gold recovery?
The Bawl Mill • Ask The Experts: Sulfides and fluxes • Legislative and Regulatory Update • Simple Rules of Gold Geology: Comparing Epithermal and Mesothermal Deposits • The "Madonna Nugget"—A Weekend Hunt to Remember • The Goldfield Mining District, Nevada—Part II • Sunset Sunbaker • A Prospecting Adventure in Mexico • Critical Minerals: Tungsten • Police Urge Author to End Treasure Hunt • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices