Smithsonian Report. ! 933. —Meier 



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An Algal Spectrogram. Obtained by Exposing an agar Plate Covered 

 With Green Cells of the Alga "Chlorella vulgaris" to ultraviolet 

 RAYS FOR 1 Hour and 14 Minutes, superimposed on a Diagram of the 

 Intensities of the Wave Lengths. 



The abscissae are wave lengths in Angstroms. The ordiiiates ore intensities in ergs/sec. cm.' 



