





















522 



MH. S. LK M. MOORti S STUDIES 



























































. 





























. 











i 









































I 



















: 













■ 















. 







hydrate framework largely impregnated with substances giving 

 proteid reactions, and this would account for the insolubility in a 

 peptonizing fluid." One method to resort to in such a case is to 

 examine the stoppers for proteid after their sojourn in the 

 gastric fluid; if the proteid reactions now fail, obviously the 

 proteid will be merely an infiltration-substance. But if these 

 reactions be now given, this may be due either to insolubility of 

 the proteid in the fluid, or to the presence of nitrogenous decom- 

 position-products. On referring to my notes, I cannot find that 

 I actually tested for proteid after the action of the peptonizing 

 fluid ; my belief is that I did— indeed, it is obviously natural 

 so to do : it is possible, however, that I may have relied upon 

 the evident intactness of the stoppers, their form, size, and refnn- 

 gence being precisely the same after as before the action. There 

 is, however, a crucial test applicable to the case ; but before going 

 into the matter further, it would be well to mention in a few 



Wiesner 



are 



Wiesner's dermatosome theory of the cell-wall depends upon 

 two facts : — (1) capacity of the wall to break up, on suitable treat- 

 ment, into small definite particles or dermatosomes ; (2) the 

 presence of living protoplasm {derrnatoplasm) in the cell-wall. 

 The latter Wiesner holds to consist at first of protoplasm alone, 

 and he contends that as long as the wall is growing it contains 

 derrnatoplasm. The cell-wall, which has a reticulate structure, 



consists of altered microsomes of the protoplasm, or dermatosomes ; 

 these are united by delicate strings of derrnatoplasm, out of which 



formed 





dermatosomes 



yfth 



Thus the cell- 

 *Al. Wiesner 



includes that proteida exist within the walls of young cells, from 

 the behaviour of the meristem at the Vegetative point of the stem 

 and of the cambium and phellogen of various plants. After 

 acting upon these with a peptonizing fluid he asserts that he can 

 get the cellulose reaction, not before. Upon this subject we have 



Mulder 



ted 



•wall, although "Wiesner 



himself shown that the facts uoon which Mulder relied are other- 



■ 











■ 















« 



* Berzelf us. Jahreeber. 1840, p. 649 ; quoted by Krasser, Sitzb. Wien. Akad 









■ 















i 

















. 



/ 







. 

















■ 



: 







■ 



i . / 



/ . 























- 





. 



■ 







■ 





: 

































































