p / 



A TREATISE 



ON THE 



DIATOMACE^ 



containing 



Introductory Remarks on the Structure, Life History, Collection, Cultivation 



and Preparation of Diatoms, 



and 



A Description and Figure typical of every known Genus, as well as 



a Description and Figure of every Specils found in the 



North Sea and Countries bordering it, including 



Great Britain, Belgium, &c\ 



BY 



DR. HENRI VAN HEURCK, 



Piofcssor of Botany and Director at the Antwerp Botanical Gardens ; 



Hon. F.J?. M.S. and New York JAN.. and Author of the 

 " Synopsis des Diatomdes de Belgique" &c. 



'z: L/8ftAf?v)S, 



gHJu*trcttefc ln> about 2, GOO ia.uve#. 



translated by 



WYNNE E. BAXTER, F.R.M.S., F.G.S. 



goufcem : 



William Wesley & Son, 28, Essex Street, Strand, W.C. 



1896. 



