CV2- 



ADVERTISEMENT. 



THESE Tracts, with the exception of the Tract 

 of Miscellanies, I lately circulated with a view to 

 inquiry. Since then I have, in the course of my 

 experiments, obtained positive results, which go to 

 establish my views on Electro-Chemistry. With 

 some additions to these Tracts, I now submit them 

 to the public presenting them, as formerly, mainly 

 as notes for further inquiry. 



MERCHISTON CASTLE BANK, 

 JANUARY 28, 1858, 



