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02 - The Limestones, Part 1

In Rocks and Their Origins

Read by J. M. Smallheer

Grenville A. J. Cole

Do you know the difference between sedimentary, igneous and metamorphic rocks? Are you interested in their geologic origin, chemical compos…

Ch 1 - Introductory

In A Text-book of Assaying

Read by Peter Yearsley

Cornelius Beringer and Cornelius Beringerandjohn Jacob Beringer

This is a formal but relaxed text covering assaying techniques for most of the substances which are mined. As the authors say: "At firs…

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