PREFACE. 



Squarery's Agricultural Chemistry. 

 Quarterly Journal of Agriculture. 

 Geological Survey of Massachusetts. 

 Annales de la Chimie. 

 Sproule's Treatise on Agriculture. 

 Monographic des Greffes. 

 Bibliotheca Agraria. 

 De Re Rustica. 

 The Theory of Horticulture. 

 Outlines of Flemish Husbandry. 

 Davy's Agricultural Chemistry. 

 Electricity in Theory and Practice. 

 Jenyns's Observations upon Meteorology. 

 Synopsis of North American Fungi. 

 De Candolle's Vegetable Physiology. 

 Botanische Zeitung. 1854. 

 Physique des Arbres. 1758. 

 Comptes Rendus. 1853. 

 Introduction to Chryptogamic Botany. 



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