at In the first two dilutions no growth whatever occurre 
~ the entire period and at the end of the experiment bs 
146 BOTANICAL GAZETTE 
_PISUM SATIVUM. 
Silver Salts. sito0 |tostoo| 0 as00 LOVE 
equiv. equiv. equiv. equiv. 
He } mm | ppg 
v Ist 24 hours a ee $25" 12.25 ) 
82504 2d 24 hours; .. ae Li9s5° 8.62 14.25 
N )Ist24hours} .. ay a ee fb ie 95 
Ag 0 2d 24hours| .. a 45°" 75] 10,575 
The solutions here are expressed in equivalents of the te 
ion, since in the Ag,SO, if we had the same fraction of 
gram-molecule as in AgNO,, the solution would contain 
as many silver ions. The dilutions were made as follows 
25° of +4y mol. to 4oo°=y¢y5 mol. 
25° of +¢yy mol. to 400°=55}95 Mol.=trFvvs equiv. 
100° of z5tyy mol. to 400°=yys¢oy MOl.=srd00 equiv. 
100 of tys¢ou Mol. to 200° =syysyy MOl.=ro9s's0 equiv., et 
The dilutions for AgNO, were made as follows: 
10° of + mol. to 1000°%=y4y mol. 
25° of zy mol. to 200° =+44yy mol. 
25° of tgy9 mol. to 4oo°= z5hy9 mol. 
- 100° of x5450 mol. to 200°=;;}55 mol., ete. 
Were quite rigid, but not more so than in the ordinary te 
grown under normal conditions. In the last three dilutio! 
siderable growth was observed, so that the killing poin 
silver salts is placed at ys'ppy Equivalents. 4 
ZEA MAIS. 
ctheana sri equiv. 1ORTOT equiv. 
peeling Adicts 
Ag.SO, te 24 hours..}) 9 ymm <mm 
- 24 hours... ee eee bcaee 
AgNO, Ist 24 hours. 4 Paes 4mm 
2d 24 hours... Se ae 
nian iis ees dag ogi 
