Stories by Harold F. Walton

The modern prospector may carry not only a Geiger counter but also test tubes and plastic bottles filled with chemicals. With them he can detect the traces of metal which surround a hidden body of ore

It is a chemical process wherein the atoms of a metal in solution are "sequestered" by ring-shaped molecules. Chelating agents have now become important tools of analytical chemistry and technology

The technique of replacing electrically charged atoms or groups of atoms with others of the same charge has become increasingly useful to science and technology