Phenomena with the Origin of Mineral Veins. 411 



Calcium sulphate 

 Sodium chloride 

 Potassium chloride 



„ iodide 



,, bromide 

 Lithium chloride 

 Magnesium chloride 

 Aluminium chloride 

 Calcium carbonate 

 Ferrous carbonate 

 Silica .... 



Total by addition of constituents 

 Total found directly 

 Excess of carbonic acid 



Grains 



Grammes 



per gallon. 



per litre. 



120-87 



1-7240 



660-80 



9-4247 



16-82 



•2400 



trace 



trace 



trace 



trace 



5-10 



•0727 



37-05 



•5284 



•86 



•0122 



161-16 



2-2985 



1-45 



•0207 



trace 



trace 



1004-11 



14-3212 



1003-00 



14-3047 



83-59 



1-1923 



It will be observed that the amount of soluble matter in the 

 first two specimens is small, and that the constituents do not 

 differ materially from those which might be expected to occur 

 in ordinary well-water from the same district. The third sample 

 evidently consists of a mixture of sea-water with water derived 

 from other sources. 



The solid contents, however, are considerably less than in 

 sea-water, and consequently, in order to institute an approxi- 

 mate comparison between them, we will suppose sea- water to 

 have been diluted with distilled water until the total amount of 

 fixed constituents has been reduced to that contained in the 

 water from .Botallack. 



For the purposes of this comparison I have selected an ana- 

 lysis of water from the Irish Sea by T. E. Thorpe and E. H. 

 Morton, in which the fixed constituents amounted to 33*8385 

 grammes per litre "*. The water from Botallack afforded 14*3047 

 grammes of solid matter per litre ; and therefore, if we multiply 

 the several estimations of Messrs. Thorpe and Morton by 



14*3047 



-— -— — =-4227, we obtain the respective amounts of the various 



oo'oooO 



constituents which would be present, in a mixture of water from 

 the Irish Sea with distilled water, containing 14*3047 grammes 

 of solid matter per litre. 



Ann. Chern. Pharm. clviii. 122-131. 



