104 



DISPERSE SYSTEMS 



oil-ill-water type and excess of oil over water producing the 

 water-in-oil emulsion. This is not so. The relative amounts 

 of oil and water have nothing to do with it. To understand 



TABLE XIX 



the significance of this, one must examine the function of the 

 colloid. 



Some means must be adopted, once the oil has been dispersed, 

 to (a) decrease the interfacial tension between the droplets and 

 the dispersion medium so that the dispersed particles will not 

 coalesce, (b) confer on the droplets an electrical charge so as to 



