x PREFACE 



lemmer's ' Lehrbuch der organischen Chemie,' by Briihl and his 

 collaborators. In addition to these general works, many treatises 

 dealing with special branches of the subject have been found of 

 extreme value: 



For physiological chemistry, ' Lehrbuch der physiologischen Chemie,' 

 by Hammarsten, and the American translation by Mandel ; also ' The 

 Chemical Basis of the Animal Body,' by Sheridan Lea. 



For enzymes, ' The Soluble Ferments and Fermentation,' by 

 J. Reynolds Green. 



For fermentation, ' Die Mikroorganismen der Garungsindustrie,' by 

 Jorgensen ; also ' Technical Mycology,' by Franz Lafar, German and 

 English editions ; ' Die Garungsorganismen,' by Klocker ; ' Die Fer- 

 mente und ihre "Wirkungen, 5 by Oppenheimer ; ' Die Zersetzung stick- 

 stofffreier organischer Substanzen durch Bakterien,' by Emmerling. 



For terpenes, ' The Chemistry of the Terpenes/ by Heusler, trans- 

 lation by Pond. 



For ethereal oils, ' Die aetherischen Oele,' by Gildemeister and 

 Hoffmann ; also ' Les Huiles essentielles,' by Charabot, Dupont, and 

 Fillet, and ' Odorographia, 1 by Sawer. 



For carbohydrates, ' Die Chemie der Zuckerarten,' by E. 0. v. Lipp- 

 mann ; ' Kurzes Handbuch der Kohlenhydrate,' by Tollens ;. 'Les 

 Sucres et leurs principaux derives,' by Maquenne. 



For glucosides, ' Die Glykoside,' by Van Bijn. 



For colouring-matters, c Die Chemie der natiirlichen Farbstoffe,' by 

 Hans Bupe. 



For alkaloids, ' Ueber die Erforschung der Konstitution und die Ver- 

 suche zur Synthese wichtiger Pflanzenalkaloide,' by Julius Schmidt. 



For ptomaines, ' Ueber Ptomaine,' by Brieger. 



Some of the sections in the German edition of Roscoe and Schor- 

 lemmer's treatise above referred to are in themselves special mono- 

 graphs, and some of the lectures in the Stuttgart series, entitled 

 1 Sammlung chemischer und chemisch-technischer Vortrage,' have 

 also been found of much value, and are quoted under their respective 

 titles. 



Mr. E. M. Holmes, F.L.S., has been good enough to revise the lists 

 of plants referred to in the present volume, and I desire to express 

 my thanks to this well-known authority for the valuable assistance 

 thus given. 



R. M. 



July, 1904. 



