103 On some Chemical Agencies of Electricity . 



of soda and siilphatc of silver, page 107. Solution of sul- 

 phate of potash was placed in contact with the negatively 

 electrified point, pure water vvas placed in contact with the 

 positively electrified point, and a weak solution of annnonia 

 was made; the middle link of the conducting- chain ; so that 

 no sulphuric acid could pass to the positive point in the di- 

 stilled water without passing through the solution of am- 

 monia. 



The power of 150 was used : in less than five minutes it 

 was found, by mcai-.s of litmus paper, that acid v/as collect- 

 \r\'Z round the positive point; in half an hour the result was 

 suSlciently distinct for accurate examination. 



The water was sour to the taste, and precipitated solution 

 of nitrate of barytes. 



Similar experiments were made with solution of lime, and 

 weak solutions of potash and soda, and t'lc results were ana- 

 losious. With stronsi solutions of potash and soda a much 

 lonsrer time was required for the exhibition of the acid ; but 

 even with the most saturated alkaline lixivium it always ap- 

 peared ill a certain period. 



Muriatic acid from muriate of soda, and nitric acid from 

 nitrate of potash, w^ere transmitted through concentrated al- 

 kaline menstrua under similar circuitistances. 



When distilled water was placed in the negative part of 

 the circuit, and a solution of sulphuric, muriatic, or nitric 

 acid in the niiddle, and any neutral salt with a base of lime, 

 soda, potash, anuDonia, or magnesia, in the positive part, 

 the alkaline matter was transmitted through the acid matter 

 to the negative surface, with similar circumstances to those 

 occurring during- the passage of the acid through the alkaline 

 inenstrua ; and the less concentrated the solution, the greater 

 ?cemed to be the facility of transmission. 



I tried in this way muriate of lime with sulphuric acid, 

 nitrate of potash with muriatic acid, sulphate of soda with 

 muriatic acid, and muriate of magnesia with sulphuric acid; 

 I emploved the power of 130; and in less than 48 hours I 

 gained in all these cases decided results ; and niaguesia came 

 over like the rest. 



Strtmtites ahd barytes passed^ like the other alkaline sub- 

 S fiances. 



