the Thermo- Electric Properties of Liquids, 523 



The solution was alkaline to litmus paper. Platinum plates. Current 

 J Cold water produced an f current. 



No. 53. The same mixture. Gold plates. Current J \\. Cold water 

 reversed the deflection. 



No. 54. The same mixture. Palladium plates. Current J 2f . Cold 

 water produced an f current. 



No. 55. 14 oz. of water and 4 oz. of dry crystals of sulphate of 

 nickel. The solution was faintly acid to litmus paper. Palladium 

 plates ; no current. Gold plates ; current J 1. Platinum plates ; 

 current j 2f. Probably the washers interfered. 



In all three instances cold water produced feeble f currents. (Com- 

 pare Nos. 15, 113, and 155.) 



No. 56. A strong solution of chloride of chromium in alcohol. The 

 solution was acid to litmus paper. Platinum plates. Current j 10 at 

 180° P., at which temperature large bubbles of vapour were formed. 

 Cold water produced a strong J current, liemarks. Probable inter- 

 ference produced by upper washer. (Compare No. 129.) 



No. 57. 12 oz. of water and 4 oz. of crystals of nitrate of cobalt. 

 The solution was strongly acid to blue litmus paper. Platinum plates. 

 No current. Cold water produced a feeble J current. 



No. 58. 12 oz. of water and 4 oz. of dry chloride of cobalt. The 

 solution strongly reddened blue litmus paper. Platinum plates. Cur- 

 rent \ 37. Cold water produced a very strong J current. (Compare 

 No. 120.) 



No. 59. The same mixture. Gold plates. Current J 38i. Cold 

 water produced a very strong \ current. 



No. 60. The same mixture. Palladium plates. Current J 25 at 

 160° P., at 180° F., and J 11 at 200° F. Cold water produced a 

 rather strong downward current and then an upward one. (For 

 similar effects compare Nos. 18 and 32.) 



No. 61. 12 oz. of water and 4 oz. of crystals of sulphate of glucinum.* 

 Solution strongly acid to litmus paper. Platinum plates. Current 

 t 1^ at 180° F., and | at 210° F. Cold water reversed the deflection. 



No. 62. The same mixture. Gold plates. Current f f. Palladium 

 plates. No current. Cold water produced a feeble downward cur- 

 rent in each instance. 



No. 63. 12 oz. of water and 4 oz. of chloride of ammonium. The 

 solution was very faintly acid to litmus paper. Platinum plates. 

 Current } 1|, and, in a second experiment, f 2J. Cold water reversed 

 the deflection in both cases. 



No. 64. The same mixture. Palladium plates. No current. Cold 

 water produced a feeble j current. 



No. 65. 12 oz. of water and 3 oz. of chloride of potassium. Solut- 



* Prepared for me by Dr. H. Trommsdorff, of Erfurt. 



2 m 2 



