
New Yorx AaricutturaL Experment STATION. 545 
and in both cases the disease appeared on over half the plants 
from which. under field conditions it might easily spread until 
every plant in the field was infected. In field experiments with 
soaked seed the following methods were used: 
Hot water. Seed soaked fifteen minutes in water at 120° 
degrees F., then for five minutes.in water at 130 degrees F. 
Copper sulphate. Seed soaked for one hour in solution of: 
copper sulphate. Strength of solution one ounce to one gallon: 
of water. 
tron sulphate (copperas). Seed soaked in iron sulphate for 
one hour, using one ounce to one gallon of water. 
Mercuric bichloride (corrosive sublimate). Seed soaked for one 
hour in solution of mercuric bichloride. Strength of solution 
one-eighth ounce to one gallon of water. 
Some of the results obtained from these experiments are com- 
pared in the following table. 
I I Ur 
Compari- Compari- Compari- 
son of son of son of 
stand. yield. poor beans. 
es ae eeuhe ceed oa ere 43 84 88 
INOS ee Pee ts se bcc e pie cose 100 100 100 
MMMM ESUADIATC 0.0. oie c een eceerces 21 28 136 
EE ee Se ee Sak S vletene : 100 100 100 
REMENLALG sy) 5.5: vols cons cine va si oveitie os 88 cL 132 
OY SES IOS SS iy Be ea a ma are 100 100 100: 
PP EPeTDICHIOVIC® 4!.%es oic's coe ons cree 28 19 81 
RR RIM soc vie 8 aed? ea ele dig woe wis 100 100 100: 




“* In column I is given a comparison of the stand of plants. 
secured under each treatment from equal areas, counting the 
stand from untreated seed in each case as 100. 
In column II the total yield of marketable beans is compared: 
in the same way. 
In column III a similar comparison is made of the percentage- 
of poor beans in the total yield in each case. 
| For example, column III shows that for every eighty-eight 
x ounces of poor beans produced under hot water treatment there. 
were 100 ounces of poor beans produced from an equal yield of 
} 69 

