TYPE PREPARATIONS 55 



Stem of Tamus, 'Tamus communis.' Fixed with 92% alcohol. 

 Cut transverse sections ^/^oo of an inch in thickness. Place the sections in 



alcohol. 



Bleach the sections. 



Manipulate Nos. 1 and 11. 



Compare the preparation with Fig. 10. Plate III. 



Stem of Mauestail, 'Hippuris vulgaris.' Fixed with the chromo-acetic solution. 

 Cut transverse sections ^ j 300 of an inch in thickness. Place the sections 



in alcohol. 



Bleach the sections. 



Manipulate Nos. 1 and 11. 



Compare the preparation with Fig. 11. Plate IV. 



Stem of Limnanth, ' Limnanthemiim nymphseoides.' 



Fixed with the chromo-acetic solution. 

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



in alcohol. 



Manipulate Nos. 3 and 12. 



Compare the preparation with Fig. 12. Plate IV. 



Stem of Sunflowee,, 'Helianthus annuus.' Fixed with 92% alcohol. 



1. Cut transverse sections ^ j soo of an inch in thickness. Place the sections in 



alcohol. 



2. Cut tangential longitudinal sections ^/i2oo of an inch in thickness. Place the 



sections in alcohol ; the line of cut must pass through the inner margin 

 of a primary bundle. 



Bleach the sections. 



Manipulate Nos. 1 and 11. 



Mount both the sections on one slide. 



Compare the preparations with Figs. 13 and 14. Plate IV. 



