218 BOTANICAL GAZETTE [OCTOBER 
The effect of the seeds upon the H-ion concentration of the 
solutions in which they were immersed is strikingly shown in the 
case of the potassium carbonate solutions. The P, values of these 
solutions were well above 9.8. After fifteen hours’ immersion, 
TABLE II 
SEEDS IMMERSED IN MGSO, FoR DIFFERENT PERIODS, RINSED IN DISTILLED WATER, 
THEN PLACED IN FRESH SOLUTIONS CORRESPONDING TO THE OLD 
P,, values Atmospheres 
7 | 6 | 5 | 4 | 4 2 1 | 05 | 0.2 | 0.04 |o.00r | 0.00 
Corn 
ee a at 6.5| 6.5| 6.4| 6.4] 6.31 6.3| 6.2] 6.2] 6.1| 6.1| 6.0] 6.0 
nite cies We hens eats a1) Act Asal A. oA TAC Ul Aid! 4. th 4G) at) 4p 5-9 
After s hours. 650.3. | AL2A AR Acer el AN AT) a eal Bid a Sd 58 
Afters hours. i202 34: . 4.1 4.3) 4.31 4:1) 4.11 4.01 3.0} 3-01 3.01 4:01-4.91 5.9 
After is hours. oc, 4.1} 4.1] 4.0} 3.9] 3.0] 3-9] 3.9] 3-9] 3-9] 4-1] 4-9] 5-9 
After 18 hours.i.... 4... 4.1] 4.1] 4.01 3.9} 3-9] 3.9] 3-9] 3.8] 4.1] 4.21 5.0] 5-7 
Alter oy hour. 0.4 3, 4.1| 4-1) 3.9 3-9} 3-9 3-9 3-9) 3.9) 3-9] 4-1] 4.9 5.6 
Rinsed and placed in fresh solution 
Hitil eS 6.6] 6.5] 6.5] 6.4] 6.4] 6.3] 6.2] 6.2] 6.1| 6.1] 6.0] 6.0 
Alter DOU 5, AcSL 4.4 ACT ATL AL) 4.0) Ai Tl ACT AN ALO) 4. OF 50 
After 21 hours......... AX 4:0) 4.3, 4.34.8) Alt ACT AS) 6. 0) 4-2) 2 Se 
te nous 4-I} 4.0] 4.0] 4.1] 4.0] 4.0] 4.0] 4.0] 4.0} 4.2] 4.9] 5-7 
Buckwheat 
Tey pe ne 6.5] 6.5] 6.4] 6.4] 6.4] 6.3] 6.3] 6.2] 6.1] 6.1] 6.0) 6.0 
pose anes Sore ears S72 So3) 8221-5. 315: 2 SiS) 5.4) Scat SOF 5. 1-5-9) 89 
SY BOUT. 55 vo 5-21 4.9] 4.9] 4.0] 4.7] 4.9] 4.9] 4-9] 5-1] 5-3) 5-5] 5-7 
After 40 hours......... 3) 5.0} §.2] 5.4] §. 4) §.3| 5.31 5-4] §-81 5:5] §:71 5-8 
and placed in fresh solution 
SNA ear er 6.6] 6.5] 6.5] 6.4] 6.4] 6.3] 6.2] 6.2] 6.1] 6.1] 6.0] 6.0 
After. Boer oi ceck: 5-1| 4-9] 4.9] 5-0] 4.9] 4.9] 4.9] 4.9] 4.9] 5-1] 5-5] 5-9 
After 5 hours... -..7:.- 4.9] 4.9] 4.9| 4.9] 4-9] 4.9] 4-9] 4-9] 5-1; 5-1] 5-5] 5-9 
After 15 hots; 26.33 2% 5.0} 5.0] 5.1| 5.0] 5.0] 5.0] 5.1] 5.0] 5.0] 5.5] 5.5] 5-8 
lupine seeds brought the Px values of these strongly alkaline solu- 
tions below the neutral point in concentrations below three atmos- 
pheres, and to 7.5 in all the higher concentrations. Both corn and 
rape seeds immersed in the solutions of low concentration of this 
salt also increased the H-ion concentration to such an extent as 
to bring the P, values below the neutral point. 
