Pfeiffer, 265, experiments in extracellular destruction of microbes, 158-60, 165-6, 175; attacks on Metchnikoff's theory, 232 _Phagocytella_, 110, 126 Phagocytes, origin of Metchnikoff's theory of, 51, 57, 278, development of theory, 110, 111, 113, 120-22, 142, inception of theory, 116-19, Baumgarten's hostile criticism of theory, 126; application of theory to erysipelas, 128, opposition to theory, 131, 151, controversy, 148, renewed experiments for proving theory, 148, 149, 150, 151, 152, 153, 279; vindication of, at Buda-Pest Congress, 159, 160; experiments with toxins and poisons, 160-62; experiments with antitoxins, 162-164, and doctrine of immunity, 170-80, and senility, 183, 280 Phagocytosis, Metchnikoff's first paper on, read at Odessa Congress of Physicians and Naturalists, 1883, 120 _Phyllirhoë_, 175 Picot, E., _Chronicle of John Neculua_ quoted, 23 Pirquet's test, 211 _Pleomorphism of Microbes_, Metchnikoff's memoir, 1888, 211 Poland, Revolution in, 1830, 26 Polypi, 72 _Popular Star_, 29 Preyer, theory of fatigue and sleep, 194 _Protospongia_, discovery of, by Saville Kent, 110 Pushkin, 2, 26 Radlkoffer, _The Crystals of Proteic Substances_, 33 Rasputin, 219 Recklinghausen, 169 _n._ Relapsing fever, experiments to prove phagocytic reaction, 129 Renon, Dr., 255 Rotifera, 193, 237-8 Rousseau, J. J., _Confessions and the Nouvelle Héloïse_, 260 _n._ Roux, Dr., 137, 255, appreciation of Metchnikoff quoted, 138-9, 141, 159, 249; collaboration with Metchnikoff, 150, 162, 163, 164, wins Osiris Prize, 189; reply to campaign against Metchnikoff, 226; friendship with and visits to Metchnikoff in his last illness, 257, 267, 273 Rubinstein, M., 260 St. Léger-en-Yvelines, 228, 237 Salimbeni, Dr., 163, 184, 211, 215, 256, 266, 272-3 Sanarelli, Dr., discovery of choleriform bacilli, 156 Sarepta, 217-18 Schaudinn, discovery of syphilitic treponema, 190 Scorpion, the, Metchnikoff's researches concerning the development of, 71 Senility and death, Metchnikoff's views on and researches, 182-8, 191-5 Serums, their action, 177 Setchénoff, Prof., 52-3, 71, 73, 78, 239; autobiography quoted, 88 Sèvres, Metchnikoff Villa at, 144, 145 Siphonophora, 72 Slaviansk, adventurous journey of the Metchnikoff family to, 12 Spain, Metchnikoff's eventful journey through, 80 Spatar, Joury Stepanovitch, 26 Spatar, Nicholas Milescu, exploits and adventures of, 23-4, mission to China, 24, literary activities and services to Peter the Great, 25, death of, 25 Spezzia, the Metchnikoffs sojourn at, 70-71 Sponges and Echinodermata, Metchnikoff's study of, 61, 72, 106, 117 Stepanita, Prince, his dealings with Nicholas Milescu Spatar, 24