Metchnikoff, Elie (or Ilia), parents' home at Panassovka, 1-3; birth of, 3; appearance and disposition in childhood, 8-11; early indications of unusual intelligence, 9, 16, 20; an adventurous journey to Slaviansk, 12-15; life at Kharkoff, 16-18; develops natural history tastes with Hodounof, 20-22; ancestry, 23-7; entry into and progress at Kharkoff Lycée, 28-34; friendships and their influence, with Bogomoloff, 29, with Tschelkoff, 32-3, 42, with Kovalevsky, 48 _seq._, with Cienkovsky, 59-60, with Kleinenberg, Virchow, and others, 118-19, with Pasteur, 132 _seq._, various, 56, 58-9, 63, 65, 93, 137; adopts atheism and shows continued interest in natural history, 29-30; love of music, 31, 34, 54-5, 93; plans a scientific career, 31; early publications, 33, 41; devotion to his mother, 35, 93-4; early love affairs, 35-6; abortive journey to Würzburg, 37-9; at Kharkoff University, 40-42; an early controversy with Kühne, 41; influenced by Darwin, 41, 50; early researches and privations in Heligoland, 43-5; letters to his mother quoted, 44-6, 65-9; at Giessen Congress, 45; work and relations with Leuckart, 45-8; eyesight troubles, 46, 62, 82-3, 105; visit to Geneva, 46-8; researches, Mediterranean, 48-53, 56-7, 61 _seq._, in the Crimea, 59-60, at Spezzia, etc., 70-73, anthropological among Kalmuks, 84-5, in intracellular digestion and Ephemeridæ, 105-11, 116, in infectious diseases, 128, in tuberculosis and phagocytosis, 133; at Pasteur Institute, 135-6, in cholera, 154-157, in immunity, 168-80, in senile atrophies and intestinal flora, 182-9, 191, 196-8, 206-8, 220 _seq._, in syphilis, 189-91, in infantile cholera and typhoid, 207-8, 220, in tuberculosis and plague among Kalmuks, 210-19; silk-worm moth, 238-9, 251; contribution to foundation of comparative embryology, 51, 56; studies in Germany and opinion of German scientists, 54-5, 57; illnesses, 55-56, 65, 104, 181, 217, 222, 229 _seq._, 249; return to Russia and Odessa University appointment, 58-60; appointed Zoology Professor at Petersburg, 61; interest in educational questions, 63, 100; life at Petersburg, 63-4, 71 _seq._; engagement and first marriage, 66-70; reappointed to Odessa University and difficulties of appointment, 73, 75, 78, 98 _seq._; his philosophical theory and its evolution, 74-7, 184-9, 191-5, 209, 222-4, 228-9, 281-3; visit to and life at Madeira, 75-7; death of first wife, 79; attempts suicide, 80-81; Mlle. Fédorovitch's description of, 83; journey to Astrakhan steppes, 82-3;