GEOLOGIC MAPS AND NOTES ALONG HIGHWAY 49 BOWEN AND CRIPPEN 



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FIG. 5. An old etching depicting an arrastre, a crude rocker (right center), and gold pan in operation. Gold was 

 freed from its ore by placing the ore on the floor of the flat- bottomed arrastre and dragging the large muller stones over 

 it by horse or mule power. The muller stones were chained to a bur which revolved about a central pivot, power being 

 applied from the end of the bar. From an original etching loaned by Walter W. Bradley. 



