Last edited by Mezigul
Monday, May 11, 2020 | History

2 edition of familiar explanation of the art of assaying gold and silver found in the catalog.

familiar explanation of the art of assaying gold and silver

James H Watherston

familiar explanation of the art of assaying gold and silver

and its bearing upon the interests of the public demostrated; with considerations on the importance of the Pix jury; a review of the past and present state of the goldsmiths" trade; and a table, showing the mixture and sterling value per ounce of every quality of gold that can be alloyed.

by James H Watherston

  • 372 Want to read
  • 2 Currently reading

Published by Smith, Elder in London .
Written in English

    Subjects:
  • Gold -- Assaying,
  • Silver -- Assaying

  • Classifications
    LC ClassificationsTN580 G6 W3
    The Physical Object
    Pagination64p.
    Number of Pages64
    ID Numbers
    Open LibraryOL17143082M

    Gold assaying: Fire assays. As mentioned, the fire assay method is the preferred way to determine a deposit’s gold grade because it is generally the most accurate. A drawback to fire assays is.   This is the 4th video in a series on sampling and analysis of precious metals. The Fire Assay process is presented and explained. This well established process .

    A Treatise on the Assaying of Lead, Copper, Silver, Gold & Mercury, by T. Bodemann & B. Kerl, J. Wiley & Sons, New York, Assaying in Three Parts – Aaron, Mining & Scientific Press, San Francisco, 4th & 6th ed. & A familiar explanation of the art of assaying gold and silver - J. H. Watherston () A Guide to Old French Plate - L Carre () A handful of silver; six stories of silversmiths - H. Townsend () A history of gold as a commodity and as a measure of value - J. Ward (). "The resulting gold is not pure, but has the composition of the natural alloy. Before accurate calculations of value are possible, the gold must be obtained pure and weighed carefully. To purify the gold it should be melted with silver, rolled out or hammered thin, boiled twice with nitric acid, washed, dried, and heated to redness.

    CONCISE HALLMARKS ON GOLD by William Chaffers This work offers a guide to the hallmarks used in the assaying of gold and silver. It should assist the reader in identifying pieces and also illustrates the wide variety and historical background of hallmarks issued by the nine assay offices of England, Scotland and Ireland. Paperback: pages. The ratio of silver to gold in inquartation must be at least three parts silver to gold. This ratio is necessary to separate the two elements by the use of nitric acid. In prac- tice, a ratio of at least ten or more parts silver to gold is used. Silver can also be added to the charge as silver nitrate or other silver salts to separate out the gold. Assaying methods are precise and are used to determine, for example, the gold content in ores up to g/ton. This makes it possible to use assaying as a means of control and arbitration. Assaying facilitates the calculation of the content of noble metal in mineral deposits and the control of the technology of extracting, refining, and.


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Familiar explanation of the art of assaying gold and silver by James H Watherston Download PDF EPUB FB2

SyntaxTextGen not activatedA familiar explanation of the art of assaying pdf and silver - Pdf. H. Watherston () A Guide to Old French Plate - L Carre: A handful of silver; six stories of silversmiths - H.

Townsend () A history of gold as a commodity and as a measure of value - J. Ward ().A metallurgical assay is a compositional analysis of an ore, metal, or alloy.

Some download pdf methods are suitable for raw materials; others are more appropriate for finished goods. Raw precious metals are assayed by an assay is assayed by titration, gold by cupellation and platinum by inductively coupled plasma optical emission spectrometry (ICP OES).

Ebook digitized by Google from the library of the University of Wisconsin - Madison and uploaded to the Internet Archive by user tpb. Addeddate Pages: