88 DK. LOUIS ELSBERG. 



dermal fields as well as the surrounding frames of cellulose 

 appeared structureless, or at most only very indistinctly granular. 

 The main mass of tissue enclosed by the epidermal system, the 

 parenchyma, presented blunt polygons separated from each 

 other by a shining narrow rim of cellulose, and containing 

 numbers of chlorophyll-granules. Some contained only very 

 few and very small such granules, surrounded by an extremely 

 delicate uncoloured reticulum, of which the filaments were of 

 about the same breadth as the points of their intersection. In 

 some polygonal fields there were a number of coarse chloro- 

 phyll-granules interspersed in a network, the threads of which 

 had points of intersection that were thickened so as to consti- 

 tute distinct though not green minute granules, while in other 

 fields there were so many coarse and smaller green granules 

 that they nearly completely filled up the polygon. Under all 

 circumstances, however, the granules, closely focussed, appeared 

 stellate, and were interconnected by means of delicate fila- 

 ments running in large numbers from each granule to all its 

 neighbours. If of small size a chlorophyll-granule appeared 

 homogeneous, of a comparatively higher lustre, and of less 

 intense green colour ; larger granules exhibited an indistinct 

 reticular structure in their interior; the largest showed the 

 reticular structure very plainly, and not infrequently in the 

 centre a small shining body was observed sending radiating 

 spokes toward the periphery, inosculating with a thin wall that 

 enclosed the granule in to to. Toward the apex of the blade 

 the granules became fewer in number and smaller in size ; at 

 the apex there were no chlorophyll granules. 



In fig. 1 are represented chlorophyll-granules (chl.) inter- 

 spersed in the reticulum (r), surrounded by the cellulose 

 frame (c). 



These observations show that the vegetable living matter 

 enclosed by the wall of cellulose is arranged in the form of a 

 network, and that a similar reticular arrangement exists in the 

 chlorophyll-granules. It is well known that chlorophyll- 

 granules are themselves minute masses of the living matter of 

 plants, coloured green by a colouring matter, to which the 



