n8 



An ANALYSIS of 



In gr. 10,000 of Rykum water there are, 



Of cauftic foffil alkali, 



Argillaceous earth, 



Siliceous earth, 



Common fait, 



Glauber's fait when exficcated, 



Total, 



In gr. 10,000 of Geyzer water, 



Cauftic foflil alkali, 

 Argillaceous earth, 

 Siliceous earth, 

 Common fait, 

 Glauber's fait exficcated, 



gr. 0.51 



0.05 



3-73 

 2.90 



1.28 



8.47 



gr. 0.95 

 0.48 



5-4o 

 2.46 

 1.46 



Total, 



l °-75 



These quantities of the ingredients, as determined by the 

 above experiments, exceed the quantities of dry extract which I 

 obtained by evaporation. Gr. 10,000 of the Rykum water gave 

 by evaporation gr. 8.25 of dry extract, and the fame quantity of 

 Geyzer gave gr. 10 only. This difference, however, can eafily 

 be accounted for. It is well known that common fait, and 

 other falts, fuffer fome lofs by evaporation, when watery folu- 

 tions of them are evaporated to drynefs j and the odour which 

 was perceived in the end of the evaporation of thefe waters, 

 made me fufpect that a little of the fait might have been loft. 

 There was therefore no reafon to expect that the refult of the 

 analytical experiments would tally exactly with the extract by 

 evaporation. I was rather furprifed and pleafcd to find that 



they 



