1878.] Mr. Gore on the 1.1 ter mo-Electric Properties of Liquids. 513 



Harley (Dr. G.) F.R.S. Rational Spelling: a Conservative Scheme 

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Tenison-'Woods (Rev. J. E.) Census ; with brief descriptions of the 

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Tidy (C. M.) Handbook of Modern Chemistry, Inorganic and Or- 

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Trois (E. F.) ContribuzioDe alio studio del sisterna linfatico dei 

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Volpicelli (P.) Nuova Sperienza sulla elettrostatica induzione. 4to. 

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Wright (C. R. Alder) Metals and their Chief Industrial Applications. 

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" On the ThermoElectric Properties of Liquids." By G. Gore, 

 LL.D., F.R.S. Received March 12, 18*78.* Read March 28. 



In the " Philosophical Magazine," January, 1857, 1 published an ac- 

 count of an investigation on the "Development of Dynamic Electricity 

 by the Immersion of unequally- heated Metals in Liquids," and observed 

 that, if we heat the upper end of a column of an electrically conduct- 

 ing liquid, the two ends of the column being bounded by plates of the 

 same metal, an upward current of electricity is usually produced if the 

 liquid has an acid reaction, and a doivnward one if it is alkaline ; and 

 I showed, in a brief manner, that this statement was true in various 

 instances, provided chemical action was excluded. This latter con- 

 dition was, in many cases, largely secured by employing platinum 

 plates, and avoiding the use of such liquids as corrode that metal. I 

 also stated that the currents thus produced did not appear to arise from 

 any action of heat or other force in the mass of the liquid. 



I have recently investigated this phenomenon more extensively, em- 

 ploying, in the first series of experiments, a similar apparatus to the 

 one described in that paper, but of a much larger and more effective 

 size, as shown below. The circular disks of metal which bounded the 

 ends of the glass cylinder were 4 J inches in diameter, and the column 



* See ante p. 272. 



