I 



PLASM 



Plasm is the universal living substance — Definition of proto- 

 plasm, chemically and morphologically — Physical character 

 — ^Viscous condition — Chemical analysis — Colloid character 

 of albumin — Albuminoid molecules — Elementary structure 

 of plasm — Work of plasm — Protoplasm and metaplasm — 

 Structures of metaplasm — Frothy structiire — Skeletal struct- 

 ure — Fibrous structure — Granular structtire — Molecular 

 structure — Plasma molecules — Plastidules and biogens — 

 Micella and biophora — Caryoplasm and cytoplasm — 

 Nuclear matter — Chromatin and achromin — Nucleolus and 

 centrosoma — Caryotheka and caryolymph — Cellular matter 

 — Plasma products — Internal plasma products — External 

 plasma products — Cell membranes — Intercellular matter — 

 Cuticular matter. 



BY plasm, in the widest sense of the word, we mean 

 the living matter, or all bodies that are found to 

 constitute the material foundations of the phenomena of 

 -life. It is usual to give this matter the name of proto- 

 plasm ; but this older and historically important designa- 

 tion has suffered so many changes of meaning through 

 the variety of its applications that it is better now to 

 use it only in the narrower sense. Moreover, recent 

 research on protoplasm has been greatly developed, 

 and several new names have been invented, which are 

 formed from the word "plasm" with a qualifying prefix. 

 These are special varieties of the general idea of plasm, 

 or special mpdificjtions of the general matter, such as 

 metaplasm, aijfhiplasm, and so on. 



The botanist, Hugo Mohl, who first introduced the 



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