Operation And Application Of Magnetometers

October 2014 by Chris Ralph

Regarding "Good Assays and Bad"

February 2012
Last month I wrote an article entitled “Good Assays and Bad,” which gathered a few comments.

Care and Lubrication of a Model 13 Laboratory Wilfley Table

June 2016
A Wilfley table works best when all of the mineral being run across it (the pulp) is about the same size.  For this reason, I took a good look at each of the samples.

Wilfley Tables—Repair, Rebuild & Set Up

September 2014
I researched the Internet and found a number of table makers, but technology has changed in the last 25 years. No one could sell me a kit for a new deck with wooden riffles...

Fine Gold Panning Without Using Mercury

March 2012
The technique I will describe is a much safer alternative and it works. It’s a fine-gold panning technique that eliminates the need for mercury amalgamation of most placer samples.

The Importance Of Mining Critical Minerals In The USA

March 2019

Critical minerals are products that the government has designated as critical to our national interest because of both their potential military and industrial applications.

Operation And Application Of Magnetometers

October 2014
The technology used in these devices has advanced greatly in the last century. Many different types of physical effects are used to measure these magnetic fields and we will briefly look at some of these.

Ask the Experts

April 2014
Bismuth oxide for assaying?

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