SODA, CAEBONATE OF 



Alkali Exported in 1873. 



If we estimate the escape of muriatic acid gas at 1,000 tons per week before the 

 passing of the Alkali Act, or at least before the introduction of the Alkali Bill into 

 Parliament, we may be considered as taking a very moderate view of the question. 



1862 



a, Wooden plug, with hole through the centre. 6 is a covering of earthenware which is 

 nearly submerged, thus closing entirely the top of the tower when the water is admitted. 

 c c, Bottom of water-cistern ; the water passes through the side of bb close to cc, thus 

 hermetically sealing the apertures. The floor of the water-cisterns at the top of each 

 tower is covered with the wooden plugs as above and their coverings. 



This supposes 2,324-96 to have been already condensed, and is a very favourable 

 view of the case. The 1,000 tons left uncondensed are equal to 4,000 tons of 25 per 



