Journal of Microscopy 3^ Ser. Vol. 3 



PLATE 6. 



F I G 



■ " '■ . 'i' ^ ' '■^''-^ 



FIG 2 



F FkiJ^jpsDeletSo. 



Apparatus for the Artificial Cultivation of Diatoms. 



FROM LE D /ATO M /STE . 



