INTRODUCTION 



13 



Filtration. Matter in suspension can be readily sepa- 

 rated from the liquid in which it is suspended, by 



Fig. 2 



a, Circular Filter Paper ; b, do. folded once ; c, do. folded twice ; 

 d, opened out into cone 



filtration. A funnel is fitted with filter paper, folded 

 as explained above; the mixture is then poured on to 

 the funnel (fig. 3), and the liquid (with any matter 



in solution) passes through. The 

 use of a glass rod down which the 

 liquid may run will be found a help 

 in pouring out the liquid. 



Funnel and Filter 

 Stand 



A, Filter paper folded into proper shape ; 



B, filter paper placed inside glass funnel 



Fig. 3 



Decantation. This is a means of separating fine 

 particles of matter in suspension from heavier sub- 

 stances also insoluble. Thus, if a mixture of soil and 



