520 PROF. JACOBI ON THE APPLICATION' OF ELECTRO-MAGNETISM 



— Series I. 



Till. 



Alloy of lead with tin. {PL Sn.) 



Lead. 



Tin amalgamated. 



Lead amalgamated. 



Amalgam of tin. (;S'«. Hg.) 



Alloy of zinc with tin, (^Zn. Sn.) 



Amalgam of lead. (PL Hg.) 



Alloy of zinc with tin and lead. 

 {Zn. Sn. PL) 



Alloy of zinc with lead. (Zn. PL) 



Alloy of tin with lead amalgamated. 



Zinc. 



Alloy of zinc with tin amalgamated. 



Alloy of zinc with lead amalga- 

 mated. 



Alloy of zinc, tin, and lead amalga- 

 mated. 



Zinc amalgamated. 



Amalgam of zinc. (Zn. Hg.) 



Amalgam of an alloy of tin and 

 lead. (Zn. PL Hg.) 



Amalgam of an alloy of tin and 

 zinc. (Sn. Zn. Hg.) 



Amalgam of an alloy of tin, zinc, 

 and lead. (Sn. Zn. PL Hg.) 



Amalgam of an alloy of zinc and 

 lead. (Zn. PL Hg.) 



+ 



— Series IL 



Tin. 



Lead. 



Tin amalgamated. 



Amalgam of an alloy of tin with 

 lead. 



Alloy of lead with tin. 



Lead amalgamated. 



Amalgam of tin. 



Alloy of zinc with tin. 



Amalgam of lead. 



Tin with lead amalgamated. 



Alloy of zinc, tin, and lead. 



Alloy of zinc and lead. 



Zinc. 



Zinc amalgamated. 



Alloy of zinc, tin, and lead amal- 

 gamated. 



Alloy of zinc and lead amalga- 

 mated. 



Amalgam of zinc. 



Amalgam of an alloy of tin and zinc. 



Amalgam of an alloy of tin, zinc, 

 and lead. 



Amalgam of an alloy of zinc with 

 lead. 



Alloy of zinc with tin amalga- 

 mated. 



We see by the above that the alloys, and principally the amalgams, 

 are always positive with relation to the simple metals. Most of the 

 amalgams, excepting those of tin and lead, may be used in plates. As 

 to the chemical action upon these various compositions, it did not take 

 place in the amalgamated zinc and the amalgam of zinc, any more than 

 in any of the alloys and amalgams of tin and lead ; but in all the other 

 compositions of zinc the disengagement of gas was very brisk. In the first 

 series, the amalgam of an alloy of tin and lead occupies a very positive 

 place, but the hope of profiting by this is negatived by the second series. 

 In employing the amalgamated plates or the amalgams of zinc, there 

 occur various circumstances the cause of which I have not yet been able 

 to discover. During the voltaic action particles of amalgam are often 

 detached in the form of flakes, which float on the liquid, and are depo- 

 sited on the copper or on the negative plates, so that these become by 



