PROTOPLASM 



Cyst envelopes of Ciliata formed by 



secretion, 242 

 Cytoblasts of Altmann, 199 



DE BARY on currents in plasmodia 



and on contraction, 270, 271 ; on 



the nature of protoplasm, 221 

 Desmids, movements of granules in 



(Nageli), 321 

 Desoliition, definition and examples of, 



15 

 De Vries, tonoplast theory of vacuoles, 



230-233 

 Diatoms, movements of granules in 



protoplasm of, 320 

 Dietl on nerve structure, 156 

 Diffraction area, 210 

 Diffusion of watery fluids through fatty 



oil, 7, 8 ; of oil through watery 



lamellae, experiments to prove, 41 ; 



a cause of radiate appearances in 



oil-foams, 41-44, in protoplasm, 



246-253 

 Diminution of volume in oil-foams 



after clearing with glycerine, 22, 



38-41 

 Discorbina, protoplasm of, 95 ; pseudo- 



podia of. 98 



" Disgregation " of protoplasm (Mont- 

 gomery), 287, 288 

 Displacements, internal, in protoplasm, 



323-325 ' 

 Distomum hepaticum, cuticle, etc., of, 



138, 139 

 Dodecahedric figures in a regular foam, 



23, 24 

 Drops of water retreating from ether or 



alcohol, 296-305 

 Durability of oil-foams, 46, 47 



EARTHWORM, see Lumbricus 



Eberth on structure of ciliated cells of 

 Anodonta, 161 



Ectoplasm of Amoebce, 107, 109 ; of 

 Actinosphcerium, 94 ; of Epistylis, 

 granules in, 201 ; of Pelomyxa, 

 116 



Eddies in water-drops retreating from 

 ether, etc., 300-305 



Egg cells, their structure, 124-127 (see 

 Ova) 



Eimer, observations on striation of 

 ciliated cells, 167 



Electrical experiments on benzin 



froths, 6 



explanations of protoplasmic move- 

 ment, 279, 280 



Electricity causing bursting of alveoli 

 in oil-foams, 26 ; reaction of foam- 

 drops to, 54-61 



Electrolysis causing negative stream- 

 ings in foam-drops, 54-57 



Embryo sac of Phanerogams, radiate 

 appearances in, 253 



Emulsion of oil-drops showing a false 

 network between the droplets, 

 211-213 



Emulsions, experiments on, 6 



Enchylema, nature of, 309, 310 ; 

 original definition of, by Hanstein, 

 223 ; of jSthalium, Reinke and 

 Rodewald on, 170, 171 ; Kiinst- 

 ler's views on, 186 ; Ley dig's views 

 on, 172, 280, 281 ; of muscles, 

 effect on contraction, 325-327 ; 

 Schwarz's views on, 204, 207 



Enclosures in protoplasm and oil-foams, 

 244-246 



Endoplasm of Amoebae, containing 

 granules, 111 ; of Ciliata contain- 

 ing minute bodies, 89 ; of Ciliata, 

 cyclosis in, 306, 307, 324, 325 ; 

 of Flagellata, granules in, 91 ; 

 of Foraminifera, 191 ; of Infusoria 

 fluid, 225 ; reticular structure of, 

 in Paramcecium caudatum, Sty- 

 lonycliia pustulata, etc., 89 



Engelmann, hypothesis of protoplasmic 

 movement, 274-278 ; on surface 

 tension and protoplasmic move- 

 ment, 289 



Epidermic cells of Lumbricus, 134-136 



Epistylis galea, granules in ectoplasm, 

 201 ' 



Epithelial cells, observations on, 131- 

 136 ; striated protoplasm in, 254, 

 255 ; of small intestine of rabbit, 

 142, 143 



Ether, drops of water retreating from, 

 296-305 



Euglena, granules in endoplasm, 91 



Euglypha, nuclear division of, 253 



Experiments upon diffusion as cause of 

 radiate appearances in foam-drops, 

 41-44 ; to prove diffusion of oil 

 through watery lamellae, 41 ; 

 electrical, on benzin froths, 6 ; 

 upon changes of volume in oil- 

 foam drops, 38-41 ; on currents 

 of Chara, 329, 330 ; on currents 

 in soap-bubbles, 319 ; on drops of 

 water retreating from ether, etc., 

 300-305 ; electrical, upon drops 

 of oil-foam, 54-61 ; with emul- 

 sions, 6 ; Frommann's, on drops 

 of oil-foam, 82-84 ; to prove in- 

 fluence of soap in producing oil- 

 foams, 13 ; upon the influence of 

 temperature upon the movements 

 of foam-drops, 53, 54 ; upon in- 



