632 



INDEX 



Wolkoff, 566 ; maximal intensity of light for 



photosynthesis, 340, j t . 

 Wollny, 175, 235, 251-3. 

 Woodward, 127, 225, 241, 419; water-culture 



method of, 418. 



Wortmann, 158, 323, 392, 504, 538, 557. 

 u. Stilling, on aniline dyes as antiseptics, 



96. 



Wossnesenski, 540. 

 Wotezal, 49, 604. 

 Wroblewski, 509. 

 Wundt, 9. 

 Wunschmann, 275, 280, 281. 



Xenomorphosis, 24. 

 Xerophily in swamp-plants, 231. 

 Xerophytes, 207, 236, 237 ; influence of soil 

 on, 231. 



Yeast, production of alcohol by, 553-561 ; 



ferment of, 502. 

 Yellow pigments, 316. 

 Yoshida, 437 ; on laccase, 509. 

 Yucca, 320; Y. filamentosa, 319, 476. 

 Zacharias, 55, 118, 187, 314, 598, 600; 



absence of nuclei in sieve-tubes, 59 ; 



behaviour of nucleus during division, 56. 

 Zander, 582. 

 Zea Mays, 91, 114, 134, 156, 247, 334; 



bleeding of, 256; exosmosis of nutri- 



ment from endosperm of, 95 ; influence 

 of temperature on intramolecular re- 

 spiration of, 537 ; seedling of, 597, 

 Fig. 70 ; self-depletion of endosperm of, 

 598. 



Ziegenbein, 466, 563 ; influence of tempera- 

 ture on respiration, 561, 562. 



Zimmermann, 41, 51, 53/66, 68, 118, 306, 

 312-9, 427, 428, 435, 450, 460, 475, 

 479, 481-3, 495, 598 ; on absorption of 

 nuclear membrane, 56 ; calcium pectate 

 in cell-walls, 133 ; cilia, 47 ; honeycomb 

 structure of protoplasm, 44 ; nemato- 

 plasts, 48 ; nucleus, 47 ; optical pro- 

 perties, influence of mechanical strains 

 on, 82; --of eel -walls and starch 

 grains, 78 ; phloroglucin in cell-sap, 

 97; plasmatic threads, 59,60; origin 

 of, H3-5;plastids, 43; Schizophytes,43. 



Zinc, occurrence of, in plants, 436 ; in 

 wood, 438 ; influence of, on growth, 436. 



Zinsser, 513 ; on root-tubercle bacteria, 399- 

 401. 



Zoller, 172,490, 585- 



Zoochloranthellae, 306. 



Zopf, 173, 276, 316, 368, 376-8, 386, 414, 

 450, 604 ; on pigments of fungi, 495. 



Zukal, 604. 



Zygnema cruciatutn, 312, Fig. 46. 



Zymogen, 503. 





