114 BOTANICAL GAZETTE [aucust 
53- AMIDO-PROPIONIC ACID. 
(Begun January 24, 8 p.M.; closed January 25, 3 P.M.) 
Concentration 
gm, mol. per liter 
Eight dibasic acids of the fatty series were investigated. 
The results are given in tables 54 to 62. In the case of oxalic 
acid it will be noted that the concentration in which the seedlings 
survive is 455 gram equivalent per liter, the same, then, a . 
case of the strong mineral acids. Oxalic acid at this concenl® 
tion is practically completely dissociated. Its toxic eft 
this weak solution is due only to the hydrogen ions that i 
solution contains, for a gram-molecule of acid potassium oxalate . 
has the same poisonous effect as half a gram-molecule of the 
Length Remarks 
30,07° alive 
26.0: * . 
33 Oo “ “ 
25.0 . es 
acid (compare table 55). 
(Begun January 14, 10 P.M.) 
54. OXALIC ACID. 
Concentration 
gm. equiv. per liter 
soy 
v 
tho 
55- ACID POTASSIUM OXALATE. 
(Begun January 16, 5 P.M.; closed January 16, 6 P.M.) 
Length h 
Jan. 15, 10 A.M. | Jan. 15, 6 P.M. 
£0.90" 
24.0." 
25.5 we 
Remarks 
oo 
Concentration 
gm, mol, per liter Length 
Teo 17.9™m 
Ge 18.0." 
szo0 9 a eg 
a 210 * 
vivo 35° 
hd a} 26.5 or 
ee ee 
flabby, dead 
apparently alive (?) 
ea 1 
apparently noe 
a ne 
