/.v/v:.v 



streaming movements of. 58, ". 1 ; 

 inlluenee of gravity, ;" I ; of li-lit, 

 //'. ; movements in dmps .if, under 

 action of electric eiinvnt, :">- : 

 nodal points of, 27-80 : "pa.-ity 

 of, 21 ; pellicle-like 1,-iyt-r round, 

 36 ; position of Crannies in, -J 1 i- 

 lil(> ; preparation of, S, IS, 111 ; 

 produced liy tin- electric current, 

 56 : produced liy potassium car- 

 bonate solution, 21 ; produce"! 

 again in reduce. 1 drops, 31 ; 

 radiate appearances in drops of, 

 41-44 ; drops of, reaction to 

 electricity, 54-61 : reduction of, 

 by evaporation, 30; resemblance 

 to protoplasm, 85 ; streaming 

 movements of, 47-52 ; streaming 

 movements of drops of, in cells, 

 80, 81 ; explanation of streaming 

 movements in drops of, 74-80 ; 

 structure of, 22-38 ; made from 

 viscid oil, nature of, 44 ; fibrous 

 structures in, 44- -Hi 



Oil membrane of protoplasm, 309, 

 318, 319 ; Quincke's views on, 

 306, 307 



Oils suitable for oil-foams, experiments 

 on, 18 



Olive oil, for producing foams, 8, 11 ; 

 method of preparing, for produc- 

 ing oil-foams, 16, 17 



Ophidomonas jenensis, structure of, 

 118 



Optical apparatus used for investigat- 

 ing protoplasm, 86 

 appearance of a network between 

 suspended granules, etc,, and 

 in foams and protoplasm, 209- 

 216 ; in plasmodia of ^Ethalium, 

 113 

 properties of microscopic foam, 23 



Organisation of protoplasm (Briicke), 

 220, 221 



Osc'dlarice, structure of, 118, 120, 

 121 



Osmosis producing radiate appearances 

 in protoplasm, 252, '2~>'-> 



Ova, radiate appearances in, 251-253 ; 

 structure of, 124-127 ; Schneider's 

 observations on, 182 



PARAFFIN OIL, for producing oil-foams, 

 11 ; extension-currents in drops 

 of, 63, 64 



Parc.mi"- '"./, triehocyst layer, 241 ; 

 cautJftinna.in\ I'lilri/nt/ii, structure 

 of endoplasm, 89 ; macro-nucleus, 

 90, 91 ; lu.rsd.rla, reticular struc- 

 ture of protoplasm, 89 



375 



iii .hops of oil-foam, :;-j. :;>; : 

 "in surface of protoplasm, _':;; : 

 in .1. i/i' t,< , s7 ; in Amoeba , 107, 

 31li ; in r/u,,,!!,,/,, (f'inl,,,,,,,,,. 

 '.'1 ; in red Mood eorpnseli-s of 

 frog, 128 ; in psnidopodia ! 

 Cfromia, In ! ; in ova of ////.//- 

 ////", }-'> : in liver rells MI< 

 111: in protoplasm ..I Miliolit 

 ft<-., '.'." ; ronml sa.-uoles, 233 ; 

 in r ( ./-//V,//,/, 88 



/' , -. currents in water surround- 

 ing, :;i7-.';i'.' ; movement < 

 footnote; non-adherent. 'J '.'." hml- 

 nol< ; prntopl.-isiM of, H;, ]17 ; 

 Virii/ix, structure of (1 Jon rue), 311 

 footnote 



/'.'///W////X, structure of _/, 176 



/', ,-i/,l,nn l uri' ntnlix, I5a.-ter<ii"ls in 

 fat body, 201 ; salivary irlands of, 

 105 



Peritoneal cells of /,'/"/<, ',/ 136, 



137 



Pfefler, artificial production of vacuol.-. 

 232 ; on the nature of protoplasm 

 in plasmodia, --'! /"////'/; on 

 the "protoplasmic membrane." 

 233. f'oofnute, 235 



Plitzuer, alveolar layer observed by, 

 239 ; on blood corpuscles <>f frog, 

 130 ; on reticular structures in 

 protoplasm, 173; on protoplasmic 

 structures, 193, 194 



Pfliiger, criticism of Leydig on nerve 

 structure, 281, 282 ; on the 

 nature of protoplasm, -J-J4 ; ob- 

 servations on epithelial cells, 

 axis-cylinders, and liver cells, 

 161 ; views on protoplasmic 

 structure, 181 



Phanerogams, radiate appearances in 

 embryo sac of, 253 



Phascolosoma elon</<>t/>//i, cuticle of, 

 138, 241 



Pigment cells of Aitlastomin/t, 1 !' 



I'll ill I n /a, epidermic cells of. !;_' 



Plant cells, movements of granules in, 

 320 ; protoplasm <>f. 122- 124; 

 rotational currents in, ,'527-330 ; 

 streamings in : Berthold's views, 

 290-305; Kiiuvlmann's views, 

 277, 278 ; Nagi-li and S.-hwen- 

 dener, 291 ; nuinek.-, 305-307 ; 

 B hmit/'s observations on, 169 ; 

 StrassbiirLTer's oliscrvat ins on, 

 167 ; Velten, 291 ; Wakker, //,. ; 

 structure of, F.iyoii's ol,M-r\ MI J..LS 

 on, 181 ; Quincke, 306 ; Velten's 

 observations on. 1 ''..' 



Plasmoilia of ^tlmlimit yjiticum, 111 



