INDEX. 



701 



Pedersen 



on evolution of carbon dioxide by 

 Barley seedlings, 199 



Penhtm curtuni, phototaxis of, 525 



Peptic ferments, 190 



Peptones, 25 



Percival, on relation of amount of carbon 

 dioxide to nutrition, 73 



Perennials, 597 



Periodicity of growth (Fig. 45), 356, 

 401 ; of heat-evolution in opening 

 flowers, 311; of movements in motile 

 leaves, 543 ; of root-pressure, 95 ; of 

 tissue-tensions, 405 ; of transpiration, 



113 



Periplasm, 619 



Perisperm, 170 



Perithecium, 625 



Peronosporeae ; life-history of, 634; re- 

 production of, 602, 619, 665 



Persoz, on diastatic ferments, 189 



Peters, on analysis of Pumpkin seeds, 



*75 

 Petiole, clasping of Solanumjasminoides 



(Fig. 46), 412 



Petzold, on tannic acid, 235 

 Pfaundler, on definition of protoplasm, 



37 



Proffer- 

 on asparagin in lupin seeds, 174 



on destructive metabolism, 294 



on direction of movement of plas- 

 modia, 528 



on induction of dorsiventrality in 

 gemmse of Marchantia, 426 



on the effect of chemical stimuli on 

 movement of antherozoids, etc., 529 



on the effect of germination on 

 aleurone-grains, 173 



on evolution of oxygen, 143 



on globoid, 184 



on motile organs, 296 



on movement of Mimosa, 537, 541, 

 544, 549, 550, 569; of Oxalis, 538, 

 544; of stamens of Cynarese, 545, 559 



on opening and closing of flowers, 

 378, 400, 404 



on osmosis, 44 



on rays of spectrum which decom- 

 pose carbon dioxide, 156, 254 



on relative turgidity of etiolated 

 and normal shoots, 391 



on starch-distribution, 163 



on structure of stamens of Cynareae, 



533. 545 



on sugar and amides in growing 

 point, 177 



on transmission of stimulus in 

 Mimosa, 584 

 Pfeiffer, on formula of starch, 183 



Pfitzer 



on movements of Diatoms, 520 

 on silicon in plants, 137 

 Pfliiger 



on intra-molecular heat, 302 

 on intra-molecular oxygen, 203 

 on luminosity, 317, 318 

 on metabolic activity, 269 

 on reproduction, 662 

 on self-decomposition of proto- 

 plasm, 1 88 



on stimulation, 301 

 on structure of protoplasmic mole- 

 cule, 1 60 



Phaeosporeae, reproduction of, 608 

 Phanerogams, endosperm, 170; forma- 

 tion of seed, 630; life-history of, 629; 

 reproduction of (Figs. 70, 71, 75, 76), 

 603, 615, 643 

 Phillip, on absorption of metallic oxides 



by plants, 122 

 Phlobaphenes, 238 

 Phloridzin, 234, 235 

 Phloroglucin, 235 

 Phosphorescence, 316 

 Phosphorus, in food of plants, 131; effect 



of, on metabolism, 132 

 Photochemical induction, 263 

 Photoepinasty, 383, 443 

 Photohyponasty, 384 

 Photomechanical induction, 435 

 Phototaxis, 525 

 Phototonus, 380, 523, 573 

 Phycochromaceae, reproduction of, 604 

 Phycocyanin, 242 

 Phycoerythrin, 242 



Phycomyces, growth of hypha (Fig. 43), 

 395 ; life-history of, 634 ; thermo- 

 tropism of, 434 

 Phycoxanthin, 242 

 Phylloxanthin, 266 

 Phytophthora infestans, 605 

 Phytophthora omnivora, life-history of, 



634 



Pierre, on ash of Brassica oleracea, 62 



Pilobolus, heliotropism of, 428 



Pinguicula, glands of, 247; movement 

 of leaf of, 545, 547 



Pinot, on geotropism, 454 



Plagiotropic organs, 424 



Plagiotropism, 501 



Planogametes, 607 



Plant, analysis of, 122 



Plant-cell (Fig. 3), 13 



Plant-movements, biological significance 

 of, 587 



Plant; income and expenditure of, 327; 

 life-history of, 628 



Plants; reproduction of, 597; tempera- 

 ture of, 313 



