102 APPENDIX 



6. Culture Solution VIII for Plankton Algae. (Rodhe, I.e.) 



* "The phosphate stock solution is autoclaved separately and added to the 

 culture solution after its autoclaving; otherwise precipitation (calcium phos- 

 phate ? ) can accidentially appear after autoclaving." 



t "The iron stock solution is likewise autoclaved separately and added to the 

 culture solution after its autoclaving; otherwise the ferric citrate is hydrolysed, 

 the iron being precipitated as Fe(OH)3." 



