168 THE PROSPECTOR'S HANDBOOK. 



w. 



WALLS The boundaries of a lode ; the upper one being the " hang- 

 ing," the lower the " foot wall." 



WASH DIRT (America and Australia) Auriferous gravel, sand, clay, 

 &c. 



WHIM An apparatus for drawing the ore of a mine up the shaft. 



WINZE A shaft sunk from level to level. 



z. 



ZEOLITES Certain hydrous silicates of alumina (with alkali, &c.). 

 They swell up and boil when exposed to the heat of a blowpipe 

 flame. 



