98 APPENDIX 



2. Nutrient Solution for Mineral Nutrition Studies o£ Blue-Green. 

 Algae. (GerlofI, Fitzgerald and Skoog.) 



This medium contains the same essential elements as the modi- 

 fied Chu No. 10 solution, but is superior to it for nutrition experi- 

 ments inasmuch as the concentration of each major essential ele- 

 ment may be varied independently of the others. 



Grams 

 Compound per Liter 



NaNOs 0413 



Na2HP04 0.0082 



KCl 0.0086 



MgCl2.6H20 0.0209 



Na2S04 0.0146 



CaCl2.2H20 0.0359 



Ferric Citrate 0.003 



Citric Acid 0.003 



Na2C03 0200 



Na2Si03 0.0250 



Hoagland's A-Z solution is added to the culture solution at one 

 twenty-fifth the strength specified for higher plants. 



