"For the Man Who Wants to Know The Secrets of Successful Drywashing." If you're into drywashing for gold, don't miss this book by expert Jim Straight. Has information that can be used with any type, style, or size drywasher. Features: old-timer tips, moisture calculations, troubleshooting, tables and charts, and more. Paperback, 5.5" x 8.5", 34 pages.
Successful Drywashing Table of Contents
Abstract & Introduction
Eluvial and Alluvial Placer Gold
Epithermal and Mesothermal Deposits
Wet and Dry Recovery Methods
What is Drywashing?
What is a Drywasher?
Evolution of Drywashing
Early Drywashing Procedures
Early Drywashing Practices
Hot and Dusty
The Bellows Principle
The Constant Air Principle
Rototiller and Cement Mixer
Pre-Drying the Dirt
Field Expedient Testing (Moisture)
Dry Material (Moisture Determination and Calculations)