Olfaction. _See also_ SMELL. Allusions to, in literature, 51 _et seq._ and digestion, 136 a primitive sense, 21 Evolution of, 21 in fish, 33 in insects, 25 in the lower animals, 21 in the sex-life, 85 Theories of, 98 _et seq._ and ventilation, 17, 109 Olfactory cells, 23 hairs, 23, 121 memory, 43 organ, 23 of insects, 28 pictures, 140 _et seq._ pigment, 24, 116, 125 region of nose, 114 Onions, effect of, 94 f.n. Orientation. _See_ Homing Instinct. Paracelsus, 70 Paris, Smell of, 151 Parker, G. H., 100, 104, 108 Pawlow, 136 Peppermint, 71 Perfumes, Classification of, 103 New varieties of, 107 Sources of, 105 Pigment, Olfactory, 24, 125 Pinewood, Odour of burning, 143 Plague, Sweet smell of, 84 Poncelet, P. P., 59 Queen Elizabeth, 3 Reality, Objective, 137 Religion, Smell in, 72 Remedies, Nauseous, 70 Olfactory, 66 Rheumatism, Acute, Acid smell of, 83 Ribot and olfactory memory, 48, 50 Rimmel, Classification of odours, 103 Roberts, Lord, and cats, 92 Rohmer, Sax, 74 Rose perfume, 57, 105 and exhaustion, 16 Roses, Attar of, 105 Rousseau, 100, 141 Sacrifice, Savour of, 72 Saints, Odour of the, 74 Saintsbury, George, 103 Salerno, Teaching of, on garlic, 47 Salmon’s Dispensatory, Fumigation in, 68 Sandal-wood, 113 Scatol, 16, 80 Scott, Sir Walter, 67 Sea, Smell of, 144 Sea-anemone, Olfactory cells of, 24 Sensation, Nature of, 134 Tactile. _See_ Touch. Sensory end-organ, Specific reaction of, 130 Shakespeare, 52, 86–89 Shelley, 47 Shops, Smell of, 149 Sinistrari of Ameno, 74 Sins, Odour of the, 74 Small-pox, Smell of, 83 Smell and the Emotions, 91, 95, 142 _et seq._ in Folk-Lore, Religion, and History, 66 and the Personality, 74, 87, 141 Exhaustibility of, 15, 133 Sensation of, 134 Sense of, Acuteness of, in man, 141 Cultivation of, 140 in old age, 82, 126 in uncivilised man, 64 mystery of, 139 Reaction-time of, 111 Sense Organ of, 23, 101, 107 Delicacy of, 107 Potential responsiveness of, 101 and Speech, 59 Subtlety of, in man, 44, 56 Vocabulary of, Emotional, 61 Etymology of, 61 _et seq._ Smith, Elliot, 72 Spectrum analysis of odours, 123 Speech and smell, 59 Spiders, Aversion towards, 92 Stenches a nuisance in law, 12 in Cologne, 8 in the East, 10 in Edinburgh, 11 in France, 9 in London, 11, 13 in Lucerne, 8 Industrial, 14 Subconsciousness, Smell and the, 44, 56, 64, 65, 79, 91, 95, 139 Sulphur compounds, Organic, 15 Taste and smell contrasted, 43 Exhaustion of, 17 Vocabulary of, 60 Tasting wine with closed eyes, 115 Terminology, Olfactory, Scanty, 59 _et seq._ Theatre, The, Perfumes in, 56 Theuriet, André, 148 Tobacco, Effect of, on olfactory sense, 142 Touch, Vocabulary of, 60 Truffle-hunter, The, 36 Tyndall, 130 Typhus fever, Odour of, 83