The fact that many millions of gold have been extracted by the cyanide process, during the last five or six years, from South African tailings
In the discussion of my paper on “ Close Sizing Before Jigging,” Mr. Louis remarks: “ What we really need to know as the basis
The conditions essential to accurate gravimetric analysis have been given. As a rule such estimations come under one of four classes: Direct Estimations These are
WASHING THE PRECIPITATE: A precipitate may be washed directly on the filter, or it may be washed partly by decantation and partly on the filter. If
A recent paper by Prof. George P. Merrill, Curator of the Department of Geology of the U. S. National Museum, Washington, upon ” An Occurrence
The accuracy of the silver-assay depends in great measure upon a careful regulation of the heat of the muffle furnace during the process of cupellation.
About six years ago the writer had occasion to visit a large magnetic iron-ore concentrating-plant, and then saw for the first time rubber belts employed
Material of Vessels for Solution The student must consider the effect of the solvent used on the vessel. In most cases the solvent used is
After solution, certain minor operations may or may not be necessary, but as a rule the next essential operation is that of precipitation. In his
When precipitation is complete the precipitate must be separated from the solution. The means of bringing about this separation will be described under this head.