58 MICROSCOPICAL RESEARCH 



Stem of Indian Corn, 'Zea mais.' Fixed with 92% alcohol. 

 Cut transverse sections ^jsoo oi an inch in thickness. Place the sections in 



alcohol. 

 Cut radial longitudinal sections ^ j soo of an inch in thickness. Place the sections 

 in alcohol. 



Bleach the sections. 



Manipulate Nos. 1 and 11. 



Compare the preparation with Figs. 27 and 28. Plate VIII. 



Rachis and Rhizome of Fern, 'Pteris aquilina.' 



Fixed with chromo-acetic solution. 

 Cut transverse sections of rachis ^ j ioo oi an inch in thickness. Place the sections 



in alcohol. 

 Cut longitudinal sections of rhizome ^/soo of an inch in thickness. Place the 



sections in alcohol. 

 (The line of cut for the longitudinal section must pass through both of the 



crescent-shaped sclerenchymatious bands, Fig. 38. 



Bleach the sections. 



Manipulate Nos. 1 and 11. 



Compare the preparations with Figs. 29 and 30. Plate VIII. 



Fig. 28.— Diagram of a T.S. of rhizome of Pteris, showing the position of vessels. 1-5 

 position of the five scleriform vessels, a, the two cresoent-shaped sclereuohyma- 

 tious bands. The dotted line indicates the direction of cut in taking the sections. 



