ii6 MICROSCOPICAL RESEARCH 



PLATE XXIII. 



CELL STETJCTURE AND CELL CONTENTS. 



Fig. 82. Transverse section. Endosperm of 'Eicinus communis' 

 X 45 dia. Fixed witli 92% Alcohol. Unstained. Endosperm 

 cells containing protein-crystals and aleurone grains. 



Fig. 83. Longitudinal section. Root of ' Scorzonera hispanica ' 

 X 60 dia. Stained with Hoematoxylin. 1. Primary ground 

 tissue. 2. Laticiferous vessels. 



Fig. 84. Longitudinal section. Stem of ' Euphorbia splendens ' 

 X 180 dia. Fixed with Absolute alcohol. Stained with 

 Borax Carmine. 1. Ground tissue — cells containing starch. 

 2. Coagulated contents of laticiferous cell. 3. Elongated 

 (dumb-bell) starch grains. 



Fig. 85. Karyokinesis in longitudinal section of Onion. 'Allium 

 cepa/ X 200 dia. Fixed with Chromo-Acetic solution. Pre- 

 pared by the cold paraffin method. Cut ^/gooo- Stained 

 Brazilin. 



