GLOBULAK FORM OF LIQUIDS. 



11 



this purpose. It is not easy to produce a mixture 

 which is exactly as heavy as the oil. The lower 

 portions usually contain more water, and are heavier; 

 while the upper layers contain more alcohol, and remain 

 lighter ; the oil, therefore, seeks the middle of the mix- 

 ture. The lower end of a small pipette (fig. 11 ) is now 

 1 nsertecl into oil, and the pipette is nearly filled by 



PIG. 11 ( real size). 



FIG. 12 (| real size). 



sucking at the upper end, which is then closed by the 

 finger. The point of the pipette is then immersed to 

 about the middle of the mixture, the upper end opened, 

 and the oil allowed to escape (fig. 12). By repeat- 

 edly filling the pipette, and emptying it into the oil 

 already in the mixture, globules of more than 3 cm in dia- 

 metermay be produced. If the liquid be gently stirred, 

 the oil-drop will become distorted, and assume various 

 shapes, but it always returns to the spherical form if 

 allowed to come to rest. .Rapid stirring tears the ori- 



