INDEX 



37i 



fluence of gravity, 54 ; of light, ib.; 

 on movements of foam -drops, 

 47 - 54 ; on oils suitable for 

 oil-foams, 18 ; on position of 

 enclosures in foams, 245 footnote ; 

 on production of foam in oil, 11, 

 12 ; of Reinke and Rodewald on 

 enchylema of sEthalium, 170, 171 ; 

 on streaming movements of foam- 

 drops in cells, 80, 81 ; on super- 

 ficial extension-currents, 61-80 



Extension-currents, 13, 48, 49, 61-64 ; 

 methods of producing, 68-73 ; in 

 foam -drops produced by electri- 

 city, 55-60 ; negative currents, 55, 

 57 ; positive currents, 57-60 ; in 

 Ciliata, 324, 325 ; in plant cells, 

 306, 327-330; in pseudopodia, 

 308 



External surface of protoplasm, 234- 

 236 



FALSE (optical) network in plasmodia 

 of JSthalium, 113 ; between sus- 

 pended granules, etc., 209-216 



Fat bodies in endoplasm of Forami- 

 nifera, 191 ; in protoplasm of 

 Miliola, 95 ; in DiscorUna, 97 



Fat body of Periplaneta, Bacteroids in, 

 201 



Fatty acids in protoplasm, 309 ; oils, 

 diffusion of watery fluids through, 7 



Fayod on structure of protoplasm, 183, 

 184 



Fibrillar theory of protoplasm, 177- 

 184 ; protoplasm in ciliated cells 

 of Hydatina, 133 ; in pseudopodia 

 of Actinosphcerium, 93 ; in con- 

 nective tissue cells, 145 ; of 

 ganglion cells, 146 ; structures in 

 colloids, 216; appearances in 

 streaming protoplasm of plant 

 cells, 122, 123 



Fibrils of muscle, structure of, 325- 

 327 ; in axis-cylinders, 148-156 ; 

 in the aster, theories of van 

 Beneden and Boveri, 261, 262 ; in 

 protoplasm, Altmann's views 

 upon, 196, 197 



Fibrous protoplasm, 255-257 ; in 

 plasmodia of ^Ethalium, 115 ; of 

 Amoeba Uattce, 109, 255 ; in blood 

 corpuscle of frog, 129 ; of Milio- 

 lidce, 97 



structures in drops of oil -foam, 

 44-46 



Filamentous pseudopodia, 315 ; of 

 Miliolidce, etc., 97-101 



Fischer, Alfred, on the structure of 

 Bacteria, etc., 118-122 



Flagellata, structure of, 91, 92, 185, 

 186 



Flemming on hyaline protoplasm, 263 ; 

 on protoplasmic structure, 177- 

 180 ; on reticular structures in 

 protoplasm, 175 ; on radiate 

 appearances in protoplasm, 259, 

 260 



Fluid nature of alveolar layer in oil- 

 foams, 35, 36 ; of microscopic 

 foams, explanation of, 34 ; of oil- 

 foams, 31 ; of protoplasm, 220-227 



Foam produced with emulsion of ben- 

 zin or xylol and soap solution, 6 ; 

 experiments on, 7 ; false network 

 in, 213-216 ; position of granules 

 in, 244-246 (see Oil-Foam) 



Foam-drops in cells, streaming move- 

 ments of, 80, 81 ; explanation of 

 streaming movements in, 74-80 ; 

 Frommann's experiments upon, 

 82-84 ; resemblance to protoplasm, 

 85 



Foam-like nature of protoplasm, 219 

 et seq. ; of colloid bodies, 216- 

 219 



Foam theory of protoplasm, in relation 

 to its movement, 207 et seq. ; 

 Kiinstler's criticisms upon,'! 86-191 



Fol, electrical theory of protoplasmic 

 movement, 280 ; views on radiate 

 appearances in protoplasm, 258, 

 261 



Foraminifera, bodies in endoplasm of, 

 (Kiinstler), 190 



Framework of protoplasm, nature of, 

 309 ; supposed to be contractile, 

 269-271 ; Altmann's objections to, 

 197, 198 ; Berthold's views on, 

 202 ; Schwarz's views, 204, 207 ; 

 its existence during life, 205 

 theory and external surface of proto- 

 plasm, 234-236 



Frenzel on radiate striation round 

 vacuole of Amoeba cubica, 251 

 footnote 



Freud, observations on ganglion cells, 

 171 



Friedrich on structure of ciliated cells, 

 160 



Frog, blood corpuscles of, 127-131 ; 

 connective tissue cells from, 144, 

 145 ; liver cells of, 140-142 ; 

 nerve fibres, 148 et seq. 



Frommann, experiments on drops of 

 oil-foam, 82-84 ; observations on 

 blood corpuscles, etc., 164 ; on 

 blood corpuscles of Salamander, 

 129 ; observations on structure of 

 ganglion cells, 160 ; observations 



