Materials Science and Engineering Commons^™

Treatment Of Gold And Silver Ores As Found In The Comstock Lode, Lee R. Grabill

Professional Degree Theses

"Statement of Problem: Metallurgy of Gold, etc.

Required, description of process and machinery used in the extraction of Gold and Silver from earthy and siliceous ores as found in California, the ores being represented by the following- SiO₂, 91.44; (Zn,Pb)+Cu₂S, 1.38; Al₂O₃, Fe₂O₃, etc. 6.39; Au, .0017, Ag₂S .12, Variable in 1st, 2nd, and 3rd class ores.

1° - The methods, etc. employed in treating 1st class ores, -such as exceed in value $150 per ton.

2° - Methods, etc. in treating 2nd class ores, such …

Metallurgy Of Gold, Wilton R. Brown

Bachelors Theses

"Metallurgy of Gold: Problem

Required, description of processes and machinery used in Extraction of Gold (and Silver) from earthy or siliceous ores as found in California

Ores represented by following:--SiO₂ 91.44; S(Zn,Pb)-Cu₂S 1.38; Al₂O₃, FeO &c 6.39; Au .0017, Ag₂S .12, variable in 1^st and 2^nd class ores

1⁰--The methods &c. employed in treating 1⁰ class ore (i.e. such as exceed in value $150 per ton)

2⁰--The methods &c. in treating 2⁰ class ore, such as contain less than $150 per ton.

Give in detail the chemistry of each process described; also illustrated by drawings of machinery for …

Silver Amalgamation, James A. Pack

Professional Degree Theses

"The process of amalgamation is one of the oldest known methods of extracting silver from its ores. The process arose from the finding of rich silver ores in districts where little or no fuel existed.

This method of silver extraction has been known and used for over three hundred years; but the method of pan amalgamation which came into use much later and has been so fully developed under American management is the one which we will here consider.

The process of pan amalgamation is peculiarly adapted to certain mining districts of the western territory of the United States"--page 2.

Project For The Treatment Of An Iron Ore, James A. Pack

Professional Degree Theses

"So great is the degree of perfection that marks the various processes of iron production that it seems almost useless to essay to further study a subject which has received the best thoughts and lifetime labors of the greatest metallurgists of all ages. Yet as we believe that there are still isolated cases whose various conditions have not received that consideration necessary to the most economical production of the pug; and believing that a most perfect knowledge of these conditions is essential to the final perfection of the metallurgy; and knowing further that a wide extended interchange of experience and …

De Re Metallica, Georgius Agricola

Rare Books

No abstract provided.