Toc: Contents (v)......Page 3 1. The Chemical Senses — Their Part in Life (1)......Page 6 2. Structure of the Chemical Sense Organs and Their Connections (39)......Page 44 3. Sensation (66)......Page 71 4. Olfaction (122)......Page 127 5. The Measurement of Odour (208)......Page 213 6. Gustation (245)......Page 250 7. The Common Chemical Sense (298)......Page 303 8. Chemical Sensibility in Lower Animals (322)......Page 327 9. Classification of Odours (371)......Page 376 10. Chemical Constitution and Odour (384)......Page 389 11. Taste and Constitution (486)......Page 491 12. Physical Properties of Odorous Materials (544)......Page 549 13. Theories of Odour (568)......Page 573 14. Perfumes and Essences (601)......Page 606 15. Flavour and Food (650)......Page 655 Author Index (699)......Page 704 Subject Index (716)......Page 721