THE MOLECULAR FORCES IX PLANTS. 



113 



We cut through a rhizome of Canna indica, scrape the cut 

 surface with a knife, and then place a small quantity of the 

 scrapings in a drop of water on a slide and cover with a cover- 



FIG. 35. Starch grains from a potato. A, simple grain ; B, semi-compound grain ; C and 

 D, compound grains; c, the organic nucleus. Magn. 540. (After Strasburger.) 



FIG. 36. Starch grains from the rhizome of Canna indica. A and B, simple grains 

 C, a semi-compound grain; D and E, compound grains. Magm 540. (After Strasburger.) 



glass. On microscopic examination we perceive large numbers of 

 beautifully layered starch grains, very excentric in construction, 

 and of considerable size (see Fig. 36). 

 P.P. 



