Nutrition. 



85 



6 grams calcium nitrate. 



1.5 grams potassium nitrate. 



1.5 grams magnesium sulphate. 



i-S grams neutral potassium phosphate. 



1.5 grams sodium chloride. 



600 cc. distilled water. 



Shake thoroughly, and keep in a tightly stoppered bottle. 

 Wash out the culture jars with water to which a little nitric 

 acid has been added, then rinse with distilled water. Fill the 

 jars to within i or 2 centimeters of the top by adding i 

 part of the original 

 solution to ID parts 

 of distilled water. 

 Put a small bit of 

 iron chloride in the 

 solution in the cul- 

 ture jars. Place the 

 seedling in the cen- 

 ter of the cover, 

 with its roots de- 

 pending in the water, 

 and wedge in posi- 

 tion with asbestos 

 fiber or cotton, tak- 

 ing care that the 

 packing should be 

 kept dry. Provide 

 a wooden rod for a 

 support when the 

 plant shall have" at- 

 tained a height of a 

 few centimeters. 

 Set in a room with 

 sunlight and the 



Fipf. 58. — Apparatus for water culture, 



stopper dividel 



ventil; 



wool. Af 



nrni . 



K, cork 



uIfg>pJ,^ite.jWMriures for 

 Iwh^/WrPlacfi ' a. cotton ^'asbestos 



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