270 



The folowing table will exhibit the quantity of each substance in 

 1,000 grammes of water: 



•Not determined. 



In determining the manner in which the above substances are com- 

 bined among themselves to form neutral compounds, the precipitates 

 formed on boiling, were fii-st considered as carbonates ; and then recourse 

 was had to the law that governs the distribution of acids and bases, 

 i. e. the strongest acids unite with the strongest bases. 



The following table will give the result of this calculation for 1,000 

 grammes, as before : 



From the above table, a very marked difference will be perceived, in 

 the composition of the water taken from the wells and that from the 

 iron pipe or logs. The large quantity of the chloride of sodium, (com- 



