INDEX 



379 



Velten's electrical hypothesis of proto- 

 plasmic movement, 279, 280 ; on 

 movements of granules, 322 ; on 

 the nature of protoplasm, 222, 

 223 ; observations on protoplasmic 

 structure, 165 ; on streaming in 

 plant cells, 291 



Venetian soap for assisting the forma- 

 tion of foam in oil, 13 



Viscid external layer of Amcebse, 314 

 nature of protoplasm, 225, 226 

 oil, how to correct, 18 ; foam pro- 

 duced from, 20, 44 ; transparency 

 of, 21 



Vorticella, structure of, 88, 89 



WAKKER on streaming in plant cells, 



291 

 Wallich on the currents in Amoebae 



and on contractility, 270 



Water-drops retreating from ether or 

 alcohol, 296-305 



Weber on streaming in plant cells, 

 291 



Went on vacuoles, 231 



White of egg, its influence on forma- 

 tion of foam in oil, 14 



XYLOL and soap solution, foam pro- 

 duced from, 6 



Z AC H ARIAS. E., on structure of Bac- 

 teria, etc., 120, 121 



Zoochlorellse in Pelomyxa viridis, 311 

 footnote 



Zoospores of Vaucheria, alveolar layer 

 in, 238 



Zoothamnium, endoplasm of, 89 ; stalk 

 muscle, 90 



Zooxanthellse in Foraminifera, 191 



THE END 



Printed by R. & R. CLARK, Edinburgh 



