the Thermo-Electric Properties of Liquids. 525 



No. 160.) With gold plates, current { 72, and a similar film was found 

 upon the upper plate only. Cold water reduced the deflection greatly 

 in each instance. 



No. 78. 14 oz. of water and 2 oz. of crystals of nitrate of potassium. 

 Neutral to litmus paper. Palladium plates. Current J J. Cold water 

 increased the deflection to 3. 



No. 79. The same mixture. Platinum plates. Current J 1^. Gold 

 plates. Current J 2J at 180° F., and 1^ at 210° F. Cold water pro- 

 duced a feeble upward current in each instance. 



No. 80. 13 oz. of water and J oz. of potassic chlorate. Neutral 

 solution. Palladium plates. Current j 1. Cold water increased the 

 deflection to 3. 



No. 81. The same mixture. Platinum plates ; no current. Cold 

 water produced a feeble J current. Gold plates ; no current. Cold 

 water had no effect. 



No. 82. 13 oz. of water and 2 oz. of large crystals of sulphate of 

 zinc. Solution strongly acid to litmus paper. Palladium plates. 

 Current \ 2^. Platinum plates. Current J 3. Gold plates. Current 

 I If. Cold water produced an upward current in each instance. 



No. 83. A saturated aqueous solution of potassic iodate. Strongly 

 acid to litmus paper. Palladium plates. Current j 30, and increased 

 by continued heat. The upper plate was slightly corroded. 



No. 84. The same mixture. Platinum plates. Current { 14. Cold 

 water decreased the deflection. (Compare No. 132.) 



No. 85. The same mixture. Gold plates. Current J at 170° F., 

 and \ at 210° F. Cold water produced a very feeble j current. 



No. 86. 13 oz. of water and 1 oz. of sticks of ordinary caustic soda. 

 Palladium plates. Current J 68. Cold water reduced the deflection 

 only to 60. No signs of corrosion. 



No. 87. The same mixture. Platinum plates. Current J 50. Cold 

 water reduced the deflection only to 45. After boiling the washers 

 half an hour in a similar mixture, and washing them, current J 15. 

 By employing new washers of pure india-rubber only, current j 28. 

 (Compare Nos. 108 and 148.) The same washers with gold plates, 

 current I 4^-. Palladium plates, and the same washers, current j 41. 

 Cold water reduced the deflection in each of these instances. 



No. 88. The same mixture and washers. Silver plates. Current 

 J 18 at 180° F., and 10 at 210° F. Cold water increased the deflection 

 to 25. No signs of corrosion. 



No, 89. 14 oz. of water and 3 oz. of crystals of sodic hyposulphite. 

 Solution very feebly alkaline to litmus paper. Platinum plates. 

 Current J 9^. (Compare No. 135.) Gold plates. Current J 6. Pal- 

 ladium plates. Current \ 16. Cold water reduced the deflection in 

 each instance. 



No. 90. 14 oz. of water and 2 oz. of nitrate of strontium. Neutral 



