54 MICROSCOPICAL RESEARCH 



Entiee Plant of Duckweed, 'Lemna minor.' After fixation and washing : — 



1st. Place tlie specimen in equal parts of alcohol, glycerine, and water; 

 allow to stand six hours. 



2nd. Place the specimens in two parts of pure glycerine and one part each 

 of alcohol and water; allow to stand three hours. 



3rd. Place the specimens in pure glycerine ; allow to stand one hour. 



4th. Mount the preparation in glycerine jelly. 



Compare the preparation with Fig. 6. Plate II. 



STEM STRUCTURE. 



YotTNG Stem of Bean, ' Vicia faba.' Fixed with chromo-acetic solution. 

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



alcohol. 



Manipulate Nos. 1 and 11. 



Compare the preparation with Fig. 7. Plate III. 



Stem of BtfTTEECup, 'Ranunculus acris.' Fixed with 92% alcohol. 

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



alcohol. 



Bleach the sections. 



Manipulate Nos. 1 and 11. 



Compare the preparation with Fig. 8. Plate III. 



Stem of "Woundvfoet, 'Stachys sylvatica.' Fixed with 92% alcohol. 

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



alcohol. 



Bleach the sections. 



Manipulate No. 7. 



Compare the preparation with Fig. 9. Plate III. 



