INDEX. 



513 



Potash, caustic. See potassium hy- 

 drate. 



chlorate, 259. 



nitrate (saltpetre), 46, 253. 



permanganate, 259. 

 Potassium hydrate (caustic potash), 



use of, 21, 186, 187, 209, 210, 366, 

 368, 412, 419, 432. 



- (saturated), reagent for chloro- 

 phyll, 248. 

 Potato disease. See Phytophthora. 



starch, 13 (fig. 5). 



See Solatium tuberosum. 

 Preparation microscope. See micro- 

 scope. 



Preparations, permanent preservation 

 of, 30, 36, 112, 250, 269 et seq., 450 ; 

 closing, 113. 



to find again a particular spot in, 



280. 



to make, 10, 444 et seq. 

 Prick inoculation, 285. 

 Prickles of rose, structure of, 94. 

 Primrose. See Primula. 

 Primula, ovary of, 397. 



sinensis, glandular hairs, 97. 

 Procambium, 213 (fig. 83), 379 (fig. 



139). 



Proembryo of mosses, 229 (fig. 91). 

 Proliferation, 346. 

 Proinycelium of Puccinia, 333. 

 Proteids. See albuminous bodies. 

 Protein-grains. See aleurone grains. 



crystals of R-icinus, 33 (fig. 13) ; 



of Pliajus, 59 (fig. 21). 

 Prothallium, homology with endo- 

 sperm, 372. 



how to grow from spores, 262. 



of Polypodium vulgare, 357 ; of 

 Equisetum, 365. 



reduced, in pollen-grain of Pinus, 



370 



Protococcus pluvialis. See Hcemato- 

 coccus. 



viridis, 259 (fig. 98). 

 Protonema of Mosses, 228 (fig. 91). 

 Protophloem, 105. 

 Protoplasm, 29, 39. 



circulation, 38 (fig. 14), 45, 49 ; con- 



traction, see plasmolysis ; living 

 and dead, 46 ; neutral lines, 48, 

 49, 50 ; rotation, 47, 48, 49, 50, 

 245; union of, between neigh- 

 bouring cells, 457 ; threads, 254. 



reactions of, 29. 



staining while living, 46 (footnote). 

 Protoplasmic movements, in leaf of 



Vallisneria spiralis, 48 ; in the 

 hairs of young shoots of Cucur- 

 bita, 47 ; in Lamium, 47 ; in 

 Elodea, 49 ; in the starninal hairs 



of Tradescantfa, 38 (fig. 14); in 

 the roots of HydrocJiaris Marsus- 

 Bance, 47 ; in Mucar, 312 ; in the 

 internodal cells of Nitella, 50 ; in 

 the oogonial cells of Chora, 309 ; 

 in the stinging hairs of Urtica, 96 

 (fig. 36) ; in the hairs of Pelar- 

 gonium, 98 ; in pollen-tubes, 392. 



Protoxylem, 104, 127. 



Prunus domestica, structure of fruit, 

 423 ; of seed, 424. 



Psalliota. See Agaricus. 



Pseudo-parenchyma of fungi, 238 (fig. 

 94). 



Pteridophyta, structure of the stele of, 

 173 ; reproduction, 354. 



Pteris aquilina, structure of rhizome 

 and leaf stalk, 172 (fig. 69). 



cretica, development of root, 224 



(fig. 89). 



Puccinia graminis, 330 (fig. 118). 

 Punctum vegetationis. See growing 



apex. 



Pycnidia, of Anaptychia, 337. 

 Pyrenoids of Cladophvra, 247 (fig. 95) ; 



Spirogyra, 252 (fig. 96). 

 Pyrola, embryo-sac, 401. 

 Pyrus communis, stone cells in the 



fruit, 65 (fig. 23) ; glucose in, 66. 



Mains, structure of fruit, 425 ; of 



seed, 426. 

 Pythium de Baryanum, 321. 



Quercus Suber, structure of cork, 187. 



RACEME, 430. 



Radicle (of embryo), 379 (fig. 139), 410 



(fig. 150), 420. See also embryo. 

 Ranunculus Ficaria, a nionocotyle- 



donous dicotyledon, 416. 



repens, structure of the adventitious 



roots, 168 ; of the vascular bundle, 



121 (fig. 45). 



Rape. See Brassica Napus. 

 Raphe, 399. 

 Raphides, 119. 

 Razor, 25, 74, 139. 

 Receiving cells, 198. 

 Receptacle (in Marcliantia), 341. 

 Receptacular tube, 425. 

 Receptive spot, 297 (fig. 110), 309, 343, 



362. 



Reduction of the chromosomes, 439. 

 Replum, 430. 

 Reproduction, asexual and sexual, 288, 



290. 



of JEcidium Berberidis, 330 ; Agari- 



cus campestris, 336 ; Algse, 290 ; 

 Anaptychia ciliaris, 336 ; Angios- 

 perms, 380 ; Aspidium Filix-mas, 

 356; Bacteria, 260; Ceratopteris 



33 



