54 
Gardiner and Ito. — On Mucilage-cells. 
the two cannot be conveniently shown in a drawing, but may be recognised with 
care, in the actual preparations, by the use of reagents. 
Fig. 42. Mucilage-cells after lengthy treatment with thirty per cent, solution of 
sodium-carbonate. The protoplasm withdraws with difficulty from the transverse 
walls, and is still connected with that structure by means of numerous delicate 
strands. Numerous external utricles have been produced by the action of the 
reagent. 
Fig. 43. A mature cell after treatment with alcohol, showing the layering which 
is now so markedly demonstrated. 
Fig. 44. Usual mode of rupture of mucilage-cell. 
