Topology and Metallurgy

Extractive Metallurgy and National Policy

Hydrometallurgical technology offers a unique possibility for developing countries to exploit their mineral resources locally instead of shipping them as concentrates. Production plants may start on a small scale with small capital investment then increase productivity later when the economy permits without financial penalty. This is in contract to smelting operations which necessitates large s...

Metallurgy of the U

This report describes the composition and some properties of the cast iron and wrought iron that form the dome of the U.S. Capitol. It is a compilation of two recent investigations, one by NIST and one by Lucius Pitkin, Inc. These investigations were implemented by the Office of the Architect of the Capitol to determine the dome’s condition and also to predict how the outer shell might respond ...

Cast Iron Metallurgy

Cast iron (CI) is one of the oldest materials in commercial use. It has excellent compressive strength and is commonly used for structures that require this property, as well as for water and sewer lines. This article explains CI metallurgy and why the understanding of this metallurgy is key to understanding other ferrous materials and alloys. The composition of cast iron (CI) varies significan...

Crystallography Materials Science & Metallurgy

Mining and metallurgy in the ancient world

detail exactly how sparse medical care was in Scotland. Even if it were available, the authors show that the stringency of the Scottish Poor Law may have denied access to it. One of their tables (9.B) "shows how much was actually spent on doctors per head of the population on the poor roll. The Scottish average was £0.0 154, or no more than 3.d per pauper per year in the old money" (p. 217). Th...