CONTENTS xiu 



of the fermentation of sugar — 335. Digestion — 336. Classification of enzymes — 

 337. Origin and distribution of enzymes — 338. Localization of digestion — 339. Di- 

 gestion of starch — 340. Enzymatic glands of seeds — 341. Action of secretion from 

 scutellum on starch — 342. Digestion of cellulose — 343. Action of cellulose dissolv- 

 ing enzymes — 344. Digestion of sugars — 345. Digestion of proteids — 346. Di- 

 gestion of albumen by Drosera — 347. Digestive action of Nepenthes — 348. Glands 

 of the pitchers of Nepenthes — 349. The clotting enzymes — 350. Pectase — 351. 

 Oxidases — 352. Demonstration of the presence of catalase and other oxidizing en- 

 zymes. 



XIII. Growth 276-307. 



353. Volume relations of protoplasm — 354. Purpose of multiplication of cells — 

 355. Cell-division — 356. Growth and senescence of the cell — 357. Size of cells — 

 358. Average size and rate of growth of some unicellular organisms — 35g. Stages in 

 the mitotic division of the nucleus — 360. Amitotic division of cells in stems — 361. 

 Course of growth in cells in the apical regions of roots — 362. Measurement of the 

 growth of the apical portion of a root — 363. Growth of the body — 364. Growth of 

 stems — 365 . Growth of petioles and peduncles — 366. Growth of a leaf with parallel 

 veins — 367. Growth of a leaf with netted veins — 368. Course of growth — 369. 

 Measurement of growth by » simple lever auxanomater and its use — 370. A pre- 

 cision auxanometer and its use — 371. Measurement of growth by weight — 372. 

 Periodicity of growth — 373. Rhythm — 374. Modification of the grand period of 

 growth — 375. Resting periods — 376. Forcing — 377. Influence of temperature 

 upon the resting periods — 378. Conditions affecting growth — 379. Influence of tem- 

 perature upon rate of growth — 380. Age, senescence and death — 381. Length of 

 life of an annual — 382. Period necessary for maturity of cells of a stem — 383. Sen- 

 escence and death in an annual plant — 384. Death of a perennial — 385. Correla- 

 tions in growth — 386. Development of latent organs as a result of correlative stimu- 

 lation — 387. Changes induced in flower stalks by fertilization — 388. Correlative 

 changes in growth due to injuries — 38g. Movements due to correlations in growth — 

 3go. Epinasty, and hyponasty — 391. Carpotropic and gametropic movements — 3g2. 

 Carpotropic and gametropic movements of peduncles and other organs — 3g3. Car- 

 potropic movements of aquatics. 



XIV. Reproduction 308-327. 



3g4. Origin of new individuals — 3g5. Multiplication of individuals as a result of 

 senescence and death of a part of the body of a plant — 396. Division of individuals 

 in Marchantia, Azolla, Marsilea and Lycopodium — 397. Propagation by gemmae 

 and other special bodies — 398. Reproduction by gemmae of Georgia (Tetraphis) 

 pellucida — 399. Propagation by modified leaves of Aulacomnion — 400. Gemmae 

 of Scapania — 401. Gemmae of Kantia — 402. Gemmae of Marchantia and Lunu- 

 laria — 403. Bulblets of Filix (Cystopteris) — 404. Adventitious buds of Asplenium 

 bulbiferum — 405 . Adventitious buds of Polystichum angulare — 406. Propagation of 

 Lycopodium — 407 Vegetative reproduction by means of buds among the seed 

 plants — 408. Origin of new plants from roots — 409. Cuttings from roots — 410. 

 Propagation by tuberous roots — 411. Propagation by stems — 412. Bulbs of Nar- 

 cissus — 4r3. Propagation of Arisaema by buds — 414. Propagation of Solanum by 

 tubers — 415. Propagation by means of stolons,, runners, offsets, etc. — 416. Bulbils 

 of Lysimachia — 417. Reproduction of Lilium by bulbils — 418. Reproduction of 

 aquatic plants by buds — 419. Grafts — 420. Veneer grafting of herbaceous plants 

 — 421. Propagation by buds formed on leaves — 422. Leaves of Begonia — 423. 

 Formation of tubers and plants by leaves of Gloxinia — 424. Propagation of Apios 

 tuberosa — 425. Propagation by flowering branches — 426. General nature and re- 

 lations of reproduction — 427. Influence of external conditions upon Vaucheria. 



