_ 90 - MOVEMENT OF PRODUCTS 



OF ASSIMILATION. 



37. Rate of removal of starch from leaves. Pieces of a leaf stained in iodine 

 at regular intervals after the plant has been placed in darkness. 



38. Path of products of assimilation. Growth of adventitious roots immediately 

 above a circular incision in a willow twig made in such a manner *& to sever the phloem. 



STORAGE. 



39. Carbohydrate storage. 



(a) Various forms of starch-grains seen under the microscope. 

 (6) Storage of starch by conjugating cells of Spirogyra. 



