423 



had to be determined^) We now tried to find out if tlie iyotrope 



■series also held for the increase of charge of acetic acid For the 



cations (Fig. 3) we chose Na, K, Am, Mg, Ca and iia, l)ecause for 



them acetic acid compounds were not at our disposition, so that 





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1) Nol all substances giving a positive charge, give a stronger charge under the 

 influence of neutral salts, as has already been established by Backmann from Upsala 

 (for some time at Utrechtj (Ueber die Verstaubungselektrizitat der Riechstoffe, 



