1346 
The subjoined investigations were, therefore, carried out to 
demonstrate in the first instance the existence of the influence of 
surface-active substances on the limitation value. Hence, they were 
carried out by means of an arbitrary colloid As, 5, sol with an 
arbitrary electrolyte BaCl, with addition of substances, which in 
diverse degrees lower the surface tension of water, namely first of 
all, isoamyl aleohol, isobutyl alcohol, propyl and ethyl aleohol the 
o-c lines of which (6 surface tension, ¢ molecular concentration) had 
been determined by TRAUBE 5). 
TABLE I. Jsoamyl alcohol. 
| Limitation value | 
Conc. of | ‘Loa, ‚ Limitation 
the alcohol | water _ | alc. mixture | value relat. 
0 | 1.08 | an 1.00 
66>) 1.08 | Ll Ve SLOT 
TRE SO Tee tie Med 3 18 
k 02 | 1.07 | 1.38 1.29 
TABLE IL. Jsobutyl alcohol. 
| 
0 0.87 | EEA | 
Ht Ake BT ak ncsOsGG a tate 
ang iG ana” hoe tee takes 
SOBs. EC tig De neae 
TABLE Ill. Propyl alcohol. 
br Gory ee oe ee 
197 | 0.92 PD PE ae 
303 | 0.92 dogs ens 
787 | EN ena ee A AT 
| | 
TABLE IV. Ethyl alcohol. 
beer Pik. | 
1560. fic SO Rie | ee Ocean a 
1) Lieb) Ann. d. Chem. 265, 27 (1891). 
