450 



Dr. Beattie on Leakage of Electricity from 







| 







Difference of 







Outside box 



Insulated 



plates 



nade of : 







potential ob- 







connected 



Substances 



Substances 



served when no 







to case 

 made of : 



used : 



placed on : 



charge given and 

 temperature 



Remarks. 













raised to about 









iron. 







350° C. 







iron. 



Lead chloride 



zinc strips on 



Negative. 



Steady. 









with iodine. 



iron plates. 









iron. 



iron. 



Calcium chlor- 

 ide with io- 

 dine. 



zinc strips on 

 iron plates. 



Negative. 



" 





iron. 



iron. 



Ammonium 

 chloride with 

 iodine. 



zinc strips on 

 iron plates. 



Negative. 



" 





iron. 



iron. 



Cupric chlor- 

 ide. 



iron plates. 



Negative. 



j» 





iron. 



iron. 



Potassium 

 chloride with 

 or without 

 iodine. 



zinc strips on 

 iron plates. 



None. 







iron. 



iron. 



Pot. chloride 

 with bromine. 



zinc strips on 

 iron plates. 



Sometimes po- 

 sitive, other 

 times nega,- 

 tive. 



Unsteady. 





iron. 



iron. 



Barium chlor- 

 ide with io- 

 dine or with 

 bromine. 



iron plates or 

 zinc strips on 

 iron plates. 



None. 







iron. 



iron. 



Zinc oxide with 

 iodine. 



zinc strips &c. 



None. 







iron. 



iron. 



Barium oxide 

 with iodine. 



" 



None. 







iron. 



iron. 



Sodium iodide. 



iron plates. 



None. 







iron. 



iron. 



Zinc iodide. 



iron plates. 



Negative, 

 sometimes 

 positive. 



Unsteady. 





iron. 



iron. 



Potassium io- 

 dide and man- 

 ganese di- 

 oxide. 



iron plates. 



Inappreciable. 







iron. 



iron. 



Potassium io- 

 dide and bro- 

 mine. 



iron plates. 



None. 







iron. 



iron. 



Potassium io- 

 dide and bro- 

 mine. 



zinc strips on 

 iron plates. 



Negative. 



Unsteady. 





iron. 



iron. • 



Potassium io- 

 dide and po- 

 tassium chlor- 

 ate. 



iron plates. 



None. 







iron. 



iron. 



Potassium 

 chlorate with 

 iodine. 



zinc strips on 

 iron plates. 



Negative. 



Steady. 





iron. 



iron. 



Potassium per- 

 manganate. 



iron plates. 



i No fixed read- 

 ing obtain- 

 able. 



Unsteady. 



