176 
BOTANICAL GAZETTE 
[SEPTEMBER 
the solution, it seems reasonably certain that copper sulphate does 
not penetrate a sound testa. 
TABLE I 
PERCENTAGE OF IMBIBITION 
(BASED ON AIR-DRY WEIGHT) 




















een eee END OF THREE DAYS | TEN DAYS 
THE LANDOLT- SUBSTANCE REMARKS 
BORNSTEIN TABLES)* 
IN ATMOSPHERES Exp. I Exp. II Exp. II 
Water GAGA | 2B 3008. he ores co: 
SRO2 Soe. M-NaCl 6. v2 ee Sapte Mineiene vie 
02 OL oe yo 2M-—NaCl Bt Get UB AF es ost 
12656907 oe M-NaCl 12,16 cee © loan © lee apes 
Sat. NaCl 7.12 Pai Da peor End of two days 
Cie yc aepane mens —AgNO, 49.83 | 46.57 70.&9 
SOU sci coe» M-NH,NO; Sa 47 042: 6 
CE Lely See Reaper —-NaNO, 34.18 | 28.88 32.00 
ay BIR pape ae M-KNO, 7.89 | 38.87 41.29 
7 Rey gone oa ian M-CuSO, 34.48 | 35.4 35-59 
M-FeSO, 34-39 | 37-48 | 44.73 
30,05 yo oe et M-KCl 55.381) - 37.69 38.3 
M-K.,C 24.55 | 32.04 36.91 
M-—Na.S.0; 28 3 7 Pee se ea fe nearer a Oe 
5% HgCl Shee Papeete Eee ee 
CH;,0H ORO ie ol ee ro volume per cent 
C,H;OH 5 ga? BS Gaaigae pee Le ey oes # . : 
H,0 se de Pet, ae, Haan ls, * Si Z 
Glycerol BREE Boggle de Oo ew ay fy ee 
Ether sat. CEE a Beri 0 Bigs pee End of 5 hrs. 
Iodine, 5 per 
oc SRP ea, Pine tn an pgs Penetrates 
—Sucrose SA AG Poe eee es 
M-Fructose KEEL a Pea ged Pomerania 
M-Glucose cp a Cea eee te ee eA 
M-Lactose ee? Be cape earn ore teen 
M-KOH Cea Ci Rascr meee PABabEepae In 23 hrs. 
M/to KOH Dea a ee 
M-NaOH 168,00 toe oved.s. lobes caus In 35 hrs. 
ibe 10 A Noy gp wee Pair re mee fe Becks eR In 10 hrs. 
B2507 oe si yeads vere eres 
M_HSO, ge UNG SERN ae rane Pare 
M-HNO, OT ee In 48 hrs. 
M-Tartaric Se) nae Baw ete PES fe gatLere 
M-Aceti oi ae BR eat SEN Grea In 11 hrs. 
M-Lactic Go See ah Cee rers 
M-Citric BPO ue Sieh hearers 






ee a 

yb tee ed, pings to 
probably somewhat higher than here in = 
ated NaCl is believed to exert 375 atmospheres of 
*In these calculations from the Landolt-Bérnstein tables correction is made only 
The osmotic pressure of 2M and 4M—NaClis 
the formation of hydration compounds. Satur. 
osmotic pressure. 
Mercury bichloride enters the seed rapidly, as do also aqueous 
solutions of iodine in KI, the monatomic alcohols, ether, the alkalies, 


