378 BOTANICAL GAZETTE [OCTOBER 
It seems quite evident from these results that one of the ratios 
of Na:Ca in which OsterHouTt found the greatest amount of 
antagonism was the one most favorable for growth in this series. 
TABLE I 
EFFECT OF CALCIUM OXIDE ON GROWTH AND ABSORPTION OF SODIUM CHLORIDE BY 
WHEAT PLANTS 
re Se ANALYSIS OF 190 ENTIRE PLANTS 
PLANTS GROWN IN Days : 
Green | Dry 
Ash NaCl weight | weight Ash CaO | NaCl 
1; — Waterco: 8 jo. 0.0462 TPAC Ge 5 BOF. is aes trace 
2; oe. NaCl oS 8 0775|0.03201...... L098 es fe 0.0553 
3 Same plus 3p pm. CaOl 8 j6 ogatio o3s4l:. eee Weis oh eae .0505 
‘ p-p.m. NaCl...... pe ieee peer an (eee seas .6 | £.74010.0940|0.0006)0.0485 
Ss. Same plus 30 ppm. Cae AG tyes 12.2 | 1.820/0.1240|0.0030/0.0543 
6. ofan ie pine ee Ora ee ee ea 0.0570|0.0020]...... 
7. 4000 p.p.m lag te Bee Be ie ew Pg ee er, ©.0660/0.0009}..---- 
8. . Same 3op.p.m CAROL Ae Galore iow eau ©.O0910/0.0017]..---- 
Plants grown in the solution containing 98Na:2Ca attained the 
greatest dry weight and were larger than any others in the series. 
From this solution the greatest amount of ash constituents was 
TABLE II 
WHEAT PLANTS GROWN 16 DAYS IN SOLUTION CULTURES; 100 PLANTS WITH SEEDS 
ATTACHED 
tice Ni oe COMPOSITION OF 100 PLANTS cei ov Mb 
SOLUTION TO ASH 
: Dry weight Ash Ca Na oe eee 
t. 100Na: -0Ca. : 2.10 ©.1950 °. 0.017 I:11.5 
a. Gane, Sa 2.74 0.2250 ©,0102 0.022 1:10.2 
4,  SgNar aoa 52. 2.37 0.1730 0106 0.019 1: 9-% 
4, Gal aCe &. 2.41 0.1842 0.0132 0.016 55555 
5: ONG: 62Ca... 2.27 0.1930 | 0.0204 0.012 1:16.1 
6. ONS: ioeta. 2.33 ©. 2040 0.0226 ° 1:25-5 
absorbed and also the greatest amount of sodium. None of the 
other solutions appeared to contain as favorable a ratio of sodium 
to calcium, although the dry weight of plants in the last 4 solutions 
does not vary enough to offset the experimental error. The 
