





510 



MB. S. LE M. MOOUE S STUDIES 



The pbycoerythrin of the cell is, of course, soluble in water, 

 hut in dried specimens I find many of the cells without any 

 trace of colouring-matter. The cell-protoplasm of 







The cell-protoplasm of dried speci- 

 mens moistened is very often most beautifully reticulate ; this 

 reticulation is only exceptionally seen in young cells, but it is 

 common in older ones ; indeed it is rare to find one of these cells 

 without some trace at least of a reticulum. The meshwork may 

 be tolerably even, or it may consist of large meshes with narrow 

 bars in one part of a cell, and of smaller ones with thick bars in 

 other parts, or both forms may be mixed. It frequently happens 

 that the protoplasm is aggregated near one end or near both 

 ends of the cell * ; starch-grains of varying size are present in 

 the meshwork. 



these cells — hematoxylin and acetic methyl-green stain in every 

 cell several small bodies in the way characteristic of nuclei, and 

 hence it is to be presumed that we have really to do with 

 syncytia ; but it is scarcely safe to dogmatize upon the minute 

 structure of the cells of a plant which has undergone desic- 

 cation. 



I have been unable to find a single nucleus m 





Reactions of the Stoppees. 



The stoppers react in the following ways : 



Acetic Acid has no effect upon them whatever, neither has 

 strong Nitric nor Hydrochloric Acid. 



Strong Hydric Sulphate causes slight swelling, but so slight as 

 to be often almost inappreciable. 



Hydrochloric Acid gives no red coloration to the stoppers, 

 neither before nor after they have been soaked in a solution of 

 phloroglucin* 



Carmine preparations : of these three were used — picrocarmine, 

 which imparted a yellow colour, and Be ale's and Thiersch's 

 carmine, which had no effect. 



Caustic Potash when cold may cause very slight swelling, but 

 sometimes none at all ; when not, dissolution is involved, but 

 without exudation of yellow drops. 



Fuchsin stains the stoppers brilliantly and permanently ; this 

 I find also to be the case with ordinary callus. 



4 





m 



* This was noticed in ray memoir on Protoplasmic Continuity. (This 

 Journal, vol. xxU 





























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