IXDKX 



fluence of gravity, r. I ; of li-ht, //,. ; 



on movements of foam -drop-, 

 17 - ;" 1 ; on oils suitable for 

 oil-foams, IS ; on ])ositi.)ii of 

 enclosures ill foams, 2 If. fnnt nut,- ; 

 nil production of t'oam in oil, 1 1, 

 12 ; of Keinke ami Uodevvald on 

 enehylema of J-://i<t?ii/i/i, 170, 171 ; 

 on streaming movements of foam- 

 drops in cells, SO, 81 ; on super- 

 ficial extension-currents, 61-80 



Extension-currents, 1:?, 48, 49, 61-61 ; 

 methods of producing, 68-73 ; in 

 foam-drops produced by electri- 

 city. 55-60 ; Hi-dative currents, 55, 

 57; positi\c 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 jEthdHwm, 113 ; between sus- 

 pended grannies, etc., 209-216 



Fat bodies in endoplasm of Forami- 

 nifera, 191 ; in protoplasm of 

 Mil tola, 95 ; in Discorbina, 97 



Fat body of I'irljihnieta, 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 Ilijthit inn, 133 ; iii 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 ./.'//"////////, 115 ; of 

 Amceba blatter, 109, 255 ; in blood 

 corpuscle of frog, 129 ; of Milln- 

 U<1', 97 



structures in drops of oil - foam, 

 44-46 



Filamentous pseudopodia, 315 ; of 

 MHioli'i'r, etc., 97-101 



Fischer, Alfred, on the structure of 

 Bacteria, etc., 118-122 



Fla-dlata, structure of, 91, 92, 1 35 



] 36 



Flemminu' <'n hyaline protoplasm, 2'i : : 

 on pmtopla -mi.- itructlire, 177- 

 180 ; on ivtieiilar structure.; in 

 protoplasm, 1 7f, ; ,,n radiate 

 appearances in prutoplasm, 2.V.', 



260 



l-'luid nature of alveolar layer in oil- 

 foams, I!."., :;*; ; of micr",copi<; 

 loams, explanation of, :{ 1 ; of oil- 

 foams, 31 ; of protoplasm, 220--J27 



Foam produced with emul-ion of beii- 

 xin or xylol and soap solution, 6; 

 experiments on, 7 ; fal.M- network 

 in, 213-216 ; jiosition of granules 

 in, 2-11-246 (.svr 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 se</. ; 

 Kiinstler's criticisms upon,'l 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 contract il> . 

 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 st nation round 

 vacuole of A/noAc, i/il>i<-<>, 251 

 footnote 



Freud, observations on ganglion cells, 

 171 



Friedrich on structure of ciliated cells, 



160 



Frog, blood corpuscles of, 127-131 ; 

 connective ti->ue ,-ells from. 1 1 I. 

 145 ; liver cells of, 140-142 ; 

 nerve lil.ivs, 148 ct .-</. 

 Frommann, experiments on drops of 

 oil-foam, M'-> I ; ol,>crvations on 

 blood corpuscles, etc., 164 ; on 

 blood corpuscles of Salamander, 

 129 ; observations on structure of 

 ganglion cells, 160 ; observations 



