496 M. Poggendorff o?^ Galvanic Circuits composed of 



No. 



Fluids of the degrees of concen- 



Zinc. 



Zinc. 



Zinc. 



Zinc. 



tration mentioned. 



Platiua. 



Silver. 



Copper. 



Tin. 



13 



Hydrochloric acid (s) 

 Sal-ammoniac (I) 



s > Z 

 s < Z 



s<: Z 



S 'iZl 



s<; Z 



14 



Salt (k) 

 Water {iv) 





Ar < w 



k <::iv 



yt = ry 



15 



Salt (Z-) 

 Hydrochloric acid (s) 





7c >s 



k > s 



k 7^ s 



16 



Salt (k) 

 Sal-ammoniac (Z) 



/c<:Z 



k^l 



k^l 



k<l 



17 



Sulphate of zinc {z) 

 Borax (&) 



z>h 



z>h 



z>h 



z>h 



IS 



Sulphate of magnesia (?n) 

 Borax {h) 



m > Z) 



m > Z> 



m >- h 



m>'h 



No. 



Fluids of the degrees of concen- 



Iron. 



Iron. 



Iron. 



Iron. 



tration mentioned. 



Platina. 



Silver. 



Copper. 



Tin. 



19 



Sulphuric acid (s) 

 Water {w) 





s=w 



s< w 



S< tf 



20 



Hydrochloric acid (s) 

 Water {w) 



S '<tO 



S <2(7 



s <:m> 



S '<'W 



21 



Caustic potash (a) 

 Water {w) 



a <.w 



a < ?u 



a^iv 



a<.w 



22 



Ammonia (a) 

 Water (w) 



a^Cw 



a <:zc 



a ^10 



a'<w 



23 



Sulphuric acid (s) 

 Iodide of potassium (i) 



s->i 



s > z 



s> z 



s^t 



24 



Hydrochloric acid (s) 

 Iodide of potassium (0 



s ^ci 



s> z 



s>- i 



s <z 



25 



Sulphuric acid (s) 

 Borax (6) 



s^'b 



s> & 



s^'h 



s> 6 



26 



Sulphuric acid (s) 

 Sulphate of zinc {z) 



s<.z 



s<:^ 



s <cz 



s <:r 



13. With platina at first «> Z slowly passing over into a stronger s < ?. 

 Silver weak, coj^per strong (although of opposite nature as with sulphuric 

 acid), tin very strong. 



14. Platina weak, silver and tin moderate, copper strong. 



15. Silver weak, the other metals moderate. 



16. Copper strong, platina almost nil. 



17. Platina and copper pretty strong. 



18. Copper strongest. 



19. All actions feeble. 



20. Likewise : with copper strongest. 



21. Platina moderate, silver weak, copper prettjf strong, tin very strong. 



22. Silver weak, tin moderate, platina pretty strong, copper very strong, 



23. Platina strong, silver and copper very strong, tin feeble. 



24. With platina s > i at first and slowly passing into s <: i only once ob- 

 served ; subsequently always immediately s < i. With silve-r and copper 

 s>' i very strong. 



25. With copper and tin strong. 



?6, With platina strong, after which iin^ 



