CHEMISTRY OF ODOURS 
THOSE interested in the chemistry of perfumes should 
consult the journals published by the Pharmaceutical and 
Chemical Societies of England, France, Italy, Spain, and 
Germany, especially the last named, as a considerable part 
of the trade in essential oils and perfumes is now in the 
hands of German specialists. For statistics, imports, 
exports, etc., see the ‘‘ Board of Trade Returns.” 
Dugald Stewart, see ‘‘ Works,” vol. iv. p. 300, for 
remarkable case of James Mitchell. 
‘“« Encyclopedia Britannica,” 9th or last edition, see articles 
on Perfumes, Scent, Spices, Incense, Condiments, Smell, 
etc. ‘*‘Chambers’s Encyclopedia” also contains much 
interesting information under above heads. 
Franck, Francois, ‘‘ Olfaction,” Dict. Ency. des Sciences 
médicales, 2nd series, contains a full history of the sense 
of smell. 
1804-54. Kitto, Dr John, ‘Cyclopedia of Biblical 
Literature,” see Perfume, Ointment, Balm, Balsam, 
Spice, etc. 
Owen’s ‘‘Comparative Anatomy and Physiology of 
Vertebrates.” 
Ramsay, Dr. William, ‘‘ Essay on Smell and Chemical 
Constituents affecting Nerve Centres of the Nose,” etc. 
(vide ‘‘ Nature,” vol. xxvi. p. 187). 
Vintschgau, Prof. V., <‘ Hermann’s Handbuch der Physiv- 
logie d. Sinnesorgone,” zweiter Theil, ‘‘ Geruch- 
sinne,” pp. 226, etc. 
Since the above paper was written Professor Ayrton, 
President of the Physical Science Section, read a most 
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