ALGAL CULTIVATION PROBLEMS 17 



that obtained by Chu (1942, 1943) indicate a fertile field of en- 

 deavor. 



It seems to the writer, that whereas the progress in cultiva- 

 tion of algae during the sixty years since Beijerinck's (1890) 

 paper has been edifying, algal cultivation is nonetheless a tool 

 for most phycologists rather than an end in itself. As a group we 

 have been remiss in using the tool where it well might have 

 helped us to finish our own particular job. 



