172 



STARCH. 



largest towards the base, where the reserve materials are princi- 

 pally stored up. The starch is easily separated from the tissues 

 containing it. These tissues are crushed and well rubbed and 

 washed in water. The whole is then thrown upon a fine sieve, 

 through which the starch passes with the water. The water is 

 evaporated and only the starch remains. 



