of certain Mine Waters. 



165 



Water from the Phoenix Mines. 



Solid matter *2130 gramme per litre, or 14*91 grains per 



gallon. Sp. gr. = 1'0002. 



Analytical Results. 





Gramme 



per litre. 



Grains per gallon. 



I. 



II. 



'• 



II. 



Carbonic acid 



•0706 

 •0438 

 0304 

 •0234 

 •0008 

 •0005 

 •0042 

 •0142 

 •1642 

 •0129 

 •0549 

 •0001 

 •0016 



•0710 

 •0430 

 •0310 

 •0226 

 •0008 

 •0005 

 •0046 

 0146 

 •1618 

 •0125 

 0544 

 •0001 

 •0016 



4-94 



307 



213 



1 64 



06 



03 



•29 



•99 



11-49 



•90 



384 



•01 



11 



4-97 



301 



2-17 



1-58 



•06 



•03 



•32 



1 02 



11-33 



•87 



381 



•01 



11 



Sulphuric acid 



Silica 



C hloriue 



Copper 



Manganous oxide 



Ferrous oxide 



Lime 



Potassa 



Soda 



Ammonia 



Nitric acid 





The foregoing results may be thus tabulated :- 





Gramme per litre. 



Grains per gallon. 



I. 



II. 



I. 



II. 





•0232 

 •0068 

 •0008 

 ■0029 

 •0748 

 •0367 

 •0017 

 •0003 

 •0256 

 •0415 

 •0025 



0224 

 •0074 

 •0008 

 •0051 

 •0710 

 •0356 

 •0017 

 •0003 

 •0246 

 •0447 

 •0025 



1-62 



•48 



06 



•20 



5-24 



2 57 



12 



02 



1-79 



2-90 



17 



1-57 



•52 



•06 



•36 



4-97 



2-49 



12 



•02 



1-72 



313 



17 



Ferrous carbonate 



Manganous carbonate 











Potassium silicate (K 2 Si0 3 ). 

 Sodium silicate (Na 2 Si0 3 ) .. 

 Sodium nitrate 



Total bv addition 



•2168 

 •2130 

 •0575 



•2161 



0580 



1517 



14-91 



4-03 



1513 

 4 07 



Total found directly 



Excess of carbonic acid ... 



The second water examined was collected at the 302-fathom 

 level at Dolcoath near Camborne ; this mine also formerly pro- 

 duced large quantities of copper ores. These have in depth gra- 

 dually given place to cassiterite, and Dolcoath is at the present 

 time the most productive tin mine in the United Kingdom. The 

 water analyzed was collected from the roof of a short crosscut, 

 in granite, 25 fathoms east of the engine shaft and 15 feet south 

 of the main lode. The water issued in considerable quantities, 



