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PREFACE 



kindness. I owe also a public tribute of gratitude to M. Kuhn, 

 a skillful brewer of Chamalieres, near Clermont-Ferrand, as 

 well as to M. Velten of Marseilles, and to MM. de Tassigny, of 

 Reims, who have placed at my disposal their establishments and 

 their products, with the most praiseworthy eagerness. 



L. PASTEU 

 Paris, June I, 1879. 





