552 



INDEX 



Hydrotropism of Mucor, 477. 



of plasmodia, 434. 



of roots, 475. 

 Hygrometer, 200. 

 Hypochlorite reaction, 27. 



Ice formation, 125. 

 Imbibition, 139. 

 Impact stimulus, 499. 

 Induction apparatus, 135. 



heterogeneous, 510. 

 Intercellular spaces, 164. 

 Inulin, 304. 



Iodine, dissolved in Carbon bisul- 

 phide, 33. 



test, 45. 

 Iodised glycerine, 293. 



potassium iodide, 45. 

 Iron as food, 84. 

 Irritation, movements of, 417. 

 Isotonic coefficients, 151. 



Kipp's apparatus, 265. 



Latex, 252, 359. 



Lead acetate, 47. 



Leaf, structure of, 10. 



Leaves, absorption of water by, 186. 



Lenticels, 167. 



Leucoplasts, 120. 



Lichens, 102. 



Limiting angle, geotropic, 441. 



Lithium, occurrence of, in plants, 82. 



Maceration method, 110. 

 Magnesium as food, 84. 

 Magnification, determination of, 522. 

 Maltose, 301. 



Marks, placing of, on plant struc- 

 tures, 150, 367, 383, 438. 

 Mechanical injury, effect of, 133. 



system, 518. 



tissue, arrangement of, 522. 

 Membranes of cells, 107. 

 Mercury, purification of, 42. 

 Mesophyll, 10. 

 Metabolism, 248. 



quantitative chemical re- 

 searches on, 322. 

 Metaboly, 425. 

 Methyl green Acetic acid, 119. 



Methyl violet, 20. 

 Micellae, 116. 



Microscope, horizontal, for measur- 

 ing increments of growth, 380. 

 Microspectral objective, 39. 

 Microspectroscope, 22. 

 Millimetre paper, 522. 

 Millon's reagent, 250. 

 Mineral substances a necessary 

 constituent of the food of 

 plants, 82. 

 substances, absorption of, by 



plants, 237. 

 substances, forms in which they 



occur in plants, 87. 

 substances, microchemical de- 

 tection of, 88. 

 substances, required by fungi, 



86. 



Moist chamber, 346. 

 Molecular forces, 107. 

 Movement of gases in plants, 161. 

 Movements due to absorption of 



water, 187. 

 of algal swarmers, influence of 



temperature upon, 428. 

 of chlorophyll bodies, 431. 

 of lower organisms, 423. 

 of irritation, 417. 

 of plasmodia, 433. 

 of protoplasm, 417. 

 of protoplasm, causes of, 418. 

 of protoplasm, dependence of, on 



presence of Oxygen, 422. 

 of protoplasm, influence of tem- 

 perature upon, 419. 

 of swarmers, 423. 

 of variation, 527. 

 of variation, causes of, 529. 

 of variation, induced by changes 

 of illumination, 527, 528, 534. 

 of variation, induced by shock, 



536, 538. 



of variation, influence of ex- 

 ternal conditions upon, 540. 

 of variation, spontaneous, 539. 

 of water in plants, 197. 

 of water, causes of, 227, and Ap- 

 pendix 2. 

 Mucilage, 332. 

 Mycorhiza, 90. 



