BULLETIN - 
TORREY BOTANICAL CLUB. 
Contribution to the Probable Biology of Plasomen. 
By ALBERT SCHNEIDER. 
It is only for few years that the theory of the cell unit has 
been wholly exploded. Since then many valuable discoveries 
have been made in regard to cell structure. Briicke, Altmann, 
Hartig, Niigeli, Flemming, Stricker, Strassburger, Guignard, 
Schmitz, Berthold, Boveri, Biitchli and Wiesner are a few ef the 
leading scientists who have made valuable contributions to cytol- 
Sy. We must, however, not forget workers of lesser note whose 
| contributions in the aggregate are indeed of great value. 
Scientists are now agreed that the cell, which has been 
heretofore considered the ultimate unit of structure, is made up of 
@ multitude of simpler units combining to form, so to speak, cell 
®rgans, as cell wall, chromoplastids, cell granules, chromotin 
_ threads, nucleoli, etc. All efforts to show that protoplasm (cyto- 
i plasm) is a homogeneous substance with a definite arrangement 
have been futile. Among the recent workers, Biitchli has en- 
deavored to show that cytoplasm always has a reticulated (waben- 
artige) Structure. That such a structure is often noticeable is cer- 
tainly true. It is likewise true that often such a structure is not 
Noticeable. Such efforts, especially when too strongly prompted 
to conform to some preconcieved notion, lead to no good results, 
ut rather create scientific distrust and confusion. . 
. That cytoplasm is not a homogeneous substance is now gen- 
_ rally accepted. It is supposed to be made up of a multitude of 
