INTRODUCTION. 19 



' Annual Statements of Trade,' issued by the Board 

 of Trade. 



Archer, T. C. : ' Popular Economic Botany.' Lon- 

 don, 1853. 



Bentley and Trimen : ' Medicinal Plants.' 1875-79. 



Bevan, G. P. : ' British Manufacturing Industries.' 

 1 6 yols. London, 1877, etc. 



Christy, T. : 'New Commercial Plants.' Parts i-io. 

 1878-87. 



Church, Prof. A. H. : ' Food.' London, 1876. 



1 Encyclopaedia Britannica.' Ninth edition. Vols. 

 I.-XXII. (A S.) 



Fliickiger and Hanbury : ' Pharmacographia.' 

 London, 1874. 



' Guide to the Museums of Economic Botany.' 

 London and Kew. Part i. Dicotyledons and 

 Gymnosperms. 1883. 



Jackson, B. B. : ' Vegetable Technology.' London, 

 1882. 



' Journal of the Society of Arts.' 1852-87. 



' Pharmaceutical Journal.' 1842-87. 



Smith, John : ' Dictionary of Useful Plants.' 

 London, 1882. 



Spon, E. : ' Encyclopaedia of the Industrial Arts.' 

 2 vols. Edited by G. Andre* and C. G. W. Lock. 

 1879-82. 



The question of classification is a difficult one. The 

 merely alphabetical arrangement of a dictionary, 

 though most convenient for reference, has the disad- 

 vantage, in so wide a subject as the present, of placing 

 in juxtaposition things entirely incongruous. In a 

 scientific collection or treatise covering the whole field 



2 2 



