r * 



f 



) 



i 





i 



I 



i 



I 



1907] 



OSTERHOUT— BALANCED SOLUTIONS 



269 



A similar though less extensive series of experiments was carried 

 out with flax, alfalfa, red-beet, and radish seeds. Another scries 

 was made by placing 



pieces of the fresh- 

 water aquatics, 

 Zannichellia and 

 Potamogeton, in 

 solutions, or in the 

 case of Lemna, by 

 allowing the plants 

 to float on the sur- 



face. 



The results 



in all these cases 

 w^ere similar to those 

 given above. 



It 



is 



thought 



Fig. 6. — ^Growth of roots of wheat in various 3W/25 



desirable to see how solutions. Quantities are stated in cubic centimeters, 



would ^^^ ^^^ aggregate length of roots in millimeters. I, NaCI 



cuttings 



11 1 . . 1000 + KCl 22 + CaCla 10, length 324. 2, NaCl 1000 



DCnave under Simi- +CaCl. ro, length 254. 3, CaCU, length 70. 4. NaCl, 



lar treatment. Cut- length 59, 



tings (about nine 



inches in length) of Tradescantia and Tropaeolum were placed 



upright in bottles^ the lower three inches of the plant being submerged 



TABLE VIII. CUTTINGS 



All quantities given are cubic centimeters of 3W/32 solutions. 



Culture Solution 



Growth in 10 Days 



Tradescantia 



TropacoUim 



Dilute artificial sea water 

 1000 NaCl 



78 MgCI. 



38 MgSO^ 

 22 KCl 

 10 CaCla 

 Distilled water 



Long roots 



Long roots 



NaCl... 

 1000 NaCI 



loCaCU 



iQoo NaCl 

 22 KCl . 

 10 CaCU ) 



Very long roots 

 No roots 



Short roots 



iL^ium length roots 



Very long roots 

 No roots 



Short roots 



Medium length roots 



