1909] OSTERHOUT—BEHAVIOR OF SODIUM AND POTASSIUM 
WHEAT (GROWTH DURING 30 DAYS). 
IOl 
TABLE II 
ALL QUANTITIES GIVEN ARE CUBIC 
CENTIMETERS OF 0.12 m SOLUTIONS 
Correspondin Aggregate length 
_ Culture solution ena on ponte point on curve Culture solution of roots per 
er plant in mm, (fig. 2) plant in mm 
NEC Joes arse 6.2 A NH Cha ares 6.2 
too NH,Cl too NH,Cl 
NaCl cy tee 3r B KCl Pe Ger 27.5 
40 NH,Cl 40 NH,Cl 
100 NaCl t ees 52 C roo EC f one 46 
20 NH. Ch 20 NH ct 
100 Natt { er ga 74 D cr Seer oe 62 
10 NH,Cl to NH,Cl 
100 NaCl ; MO paree 80 E KCl ; #2-5 
5 NH,Cl 5 sec 
I0o NaCl ; Fails 85 F or RL 75 
ENE! t NH,Cl 
me oy ; ee. 67 G ee ee 68 
NaCl 6. .<¢ 2. ee 55 H KEL G a. | 66 
Distilled water, 725 ™™ 
Experiments with magnesium show that it is antagonized in about 
the same degree by both Na and K (table III and fig. 3). 
3-—Antagonism curve, MgCl, vs. 
oc peee curve -x-x-x-) and MgCl. v 
-0-0-~ 
represents the amount of growth of w 
roots in a sol 
table 
MgCl, 
given Opposite FE corresponding letter in 
Til 
whose composition is 
