then OTight, infttad of beginning a fecond lliaft and bringing 

 up a level to it, to have made drifts at the bottom of the fhafc 

 to the nor^ and to the fouth : to the north until they came 

 out to day, which drift would have ierved to drain off the water ; 

 and to the fouth until they had penetrated into the, mountain 

 far enough to recover the load again. 



34th. And this is ftill what in our opinion ought to be done ; 

 for the fecond fliaft and its level, being only in the brol of the 

 load, are perfcdly ufclefs ; and the firft fliaft which is entirely 

 in the body of the ore, and much deeper than the other, is 

 well circumftanced for exploring the i-ichnefs of this load ; in 

 confequence of which we think it will be difcovered. 



35th. If upon this trial it fhould be found that the ore is 

 fcarce or poor, it will then be right to continue the fhaft and 

 make a trial of the load at a greater depth : and for this work 

 it will be neceffary to provide pumps, called fupplementary 

 or eftablifhed buckets, of a fufficient fize to keep the water 

 free. 



36th. This may not be an Improper place to reniarlc, that the 

 probe is an inftrument often fallacious in the riches of mines, 

 for metallic beds obferve no regularity, and their gage never 

 being homogeneous, the probe, which reaches only one fpot, 



U 2 may 



