53 



same cells, forming an appendix to the granules, or greater 

 masses, presenting an amorphous gelatine in which the chloro- 

 phylle granules are immersed, &c. These various forms are 

 found for instance in the parenchymatous cells of leaves of 

 many cellular plants, as in Sedum, SempervivumjPinusStrobus, 

 &c. I showed * that these amorphous masses are spread over 

 the inner walls of the cells, and are frequently accompanied 

 with common green globules. In the cells of the vertical layer 

 of leaves this occurrence of amorphous chlorophylle is espe- 

 cially common, so that, for instance in the Cycadece, the entire 

 walls of these cells are at times clothed with it. 



M. Mohl attempts to fix distinctions between the granules, 

 which lie in the chlorophylle and the chlorophylle granules 

 themselves, although it appears probable to him that they 

 stand in very close connexion with each other. Here my ob- 

 servations do not agree with those of M. Mohl ; for the chloro- 

 phylle is properly speaking neither granular nor amorphous, 

 but it adheres in the granules to a semi-solid mass which is 

 penetrated by it, and the amorphous chlorophylle is conse- 

 quently a gelatinous semi-fluid mass more or less coloured by 

 chlorophylle. Of what this gelatinous substance, the basis of 

 the amorphous chlorophylle, consists, it is difficult to deter- 

 mine, the quantity at the disposal of the operator being too 

 small. The case is quite different with the substance serving 

 as substratum to the granules coloured by the chlorophylle, 

 which M. Mohl erroneously terms chlorophylle granules. 

 Both M. Mohl and Dr. Schleiden f endeavour to prove in op- 

 position to my views that they are not granules, but solid 

 masses, which however I published two years ago {. 



The case of granular masses being mistaken for vesicles 

 occurred very frequently, even till within a few years, and the 

 microscope alone was the cause, showing in some similar glo- 

 bules so strong a shadow round the object, as to lead to the 

 conclusion of the presence of a distinct enveloping membrane, 

 which even occurred to M. Mohl at that period respecting the 

 amylum granules. 



We come now to the most important subject treated of in 



* Physiologic, i. p. 202. 



f Beitrage zur Keimtniss der Ceratophylleen. Linnaea, 1837, p. 331. 



: Year's Report for 1835. Wiegtnann's Archiv., 1836, p. 90, &c. 



