MINERALOGY. 325 



versed by any river, and whether any lakes are In the vici- 

 nity. The practical Mineralogist will not fail ascertaining 

 if the waters in the vicinity of Mineral countries are impreg- 

 nated with any, and what Mineral, if they are prejudicial or 

 salubrious to the inhabitants ; if any springs of warm or hot 

 water occur; the craters of burning or extinguished Volca- 

 noeSj will also command his attention, and if any use is made 

 of the lava, the periods at which these places are or have 

 been in a state of combustion ; if vegetation is affected by 

 the mineralized waters which may occasionally overflovv 

 such districts, and in what way ; the various modes practiced 

 to form or procure Nitre, common Salt, Sulphur, &c., will 

 necessarily demand his notice ; with the quantities of these 

 and other Minerals or Metals extracted or obtained from any 

 given quantity of the crude material. 



Much more might be pointed out in this interesting science^ 

 as not only worthy the attention of the Naturalist, but of 

 the greatest importance to the advancement of science, the 

 uses to which the various Mineral substances are applicable, 

 being so numerous, and of such vital importance to tlie suc- 

 cessful application of the Arts and Sciences, that no oppor- 

 tunity should be lost of acquiring a knowledge of every use 

 to which Mineral substances are capable of being applied. 



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