Recent research has focused on understanding the composition, behavior, and potential recovery methods for these elements from coal combustion byproducts, particularly coal ash and fly ash.

To save the greatest part of this, S. Adams, of Boston, Mass., has invented a cinder and coal sifter, consisting of a circular riddle attached to a spindle, which can be rotated by hand ...

These techniques utilize nuclear reactions to analyze the composition of materials ... and non-destructive quantification of light elements in coal and other materials. This method allows for ...