232 Intelligence and Miscellaneous Articles. 



following intensities were obtained : — 



i .... 63 123 148 187 

 10 6 A .... 71 64 72 67 



The value of h is therefore almost independent of i, and thus 

 Peltier's phenomenon proportional to the intensity of the current. 



If when solutions of Glauber's salts of various concentration 

 were superposed on each other, and the bulb of the thermometer 

 was not at the surface of separation of the liquids, or if the same 

 liquid was above and below the diaphragm, no appreciable value 

 was obtained for h, so that the above results are not limited by 

 other influences of heat. 



Prom the experiments as a whole, the value of h is obtained 

 when solutions of the following sulphates are combined with solu- 

 tion of CuS0 4 of specific gravity s, and in like manner the solutions 

 of the chlorides with solution of cupric chloride of sp. gr. 1*10. The 

 values of h are positive, when the greater heating effect takes 

 place, i. e. when the current passes from the lower and more con- 

 centrated solution to the one above it. 



Formula. 



5. 



h. 



Formula. 



s. 



h. 



N 



1-13 



1-07 



1-13 



1-06 



1-057 



1-1 



109 



107 



1-137 



112 



1-05 



-49 



12 



29 



29 



52 



64 



74 



91 



101 



106 



120 



NiCl 2 



1-115 



1-029 



112 



1-19 



1-29 



1-08 



1-068 



1-15 



1-167 



1-026 



-60 

 -46 

 -36 

 -23 



+ 14 

 24 

 27 

 38 

 38 

 52 



NiS0 4 



HC1 



Ni(NH 4 ) 2 S0 4 ... 

 CuS0 4 - 



MsCL 



Zn01 2 



(NH,) o S0, 



M01 2 



Na,SO, 



KC1 



MnS0 4 



NaCl 



MgS0 4 



CaCl 2 



K 2 S0 4 



Mn01 2 



ZnS0 4 



NH 4 01 



FeS0 4 





H 2 S0 4 





The series do not agree with each other. With solutions of 

 various strengths, apart from H 2 S0 4 and HC1, h is always posi- 

 tive. 



If the entire apparatus was filled with water, and the thermo- 

 meter was surrounded by a semicircle which was half of iron and 

 half of zinc wire, and the current was passed through, the mean of 

 ten experiments was found to be ft = 18 ; so that the Peltier pheno- 

 menon between liquids is not of a less order of magnitude than 

 between metals. As according to Bellati the electromotive force 

 between zinc and iron is 0-0024 volt, the absolute value of Pel- 

 tier's phenomenon may be calculated from this for the liquids 

 investigated. — Atti delta B. Ace. di Torino, vol. xx. 1885 ; Bei- 

 blatter der Physik, vol. x. p. 118. 



