The following estimation is given as an exercise in distillation. The method has been used to advantage, being convenient and requiring little apparatus. For refined
For practice the student may take either “ Stourbridge ” or “ Dinas ” fireclay and sand. The following table gives their average composition. The
Magnetite is the most strongly magnetic of all minerals, and it is therefore natural that the earliest application of magnetism to ore dressing was for
Wetherill Rowand Separator Type “E” Separator The machine consists essentially of a belt which conveys the ore between the poles of a series of magnets,
Many classifications based on the method of treatment, on differences in construction, etc., have been suggested to include the different types of magnetic separators; separators
The action of permanganate of potash upon a ferrous solution is one of oxidation, hence it is evident that if any other oxidising agent is
Within the limits of the error of experiment, a definite volume of a solution or gas represents a certain weight of metal or other substance,
Gasometric methods are not much used by assayers, and, therefore, those students who wish to study them more fully than the limits of this work
The chief oxidising agents (which are also de-sulphurisers) are the following: Nitre, or Potassic Nitrate.—This salt fuses very easily to a watery liquid. It oxidises
The de-oxidising agents most in use are the following: Charcoal.—Powdered wood charcoal; it contains more or less hygroscopic moisture and about 3 or 4 per