39 
Experiment 3. 
August 27 (4:35). — Vinegar, 4 ounces; 3 ounces saturated arsenic solution. 
August 2S (p.m.). — Foliage, blossoms, and an occasional young pod badly 
scorched. 
August 27. — Dr. Page was directed to prepare the following solutions: 
1 ) Saturated cold-water solution of commercial arsenic. 
(2) 1 ounce corrosive sublimate to 1 pint cold water. 
(3) 1 ounce potassium cyanide to 1 pint cold water. 
Samples of each solution were kept, taken to Sbreveport, and tested. They had 
been perfectly prepared, and the poisons were therefore actually in solution at the 
time of application. 
The following two mixtures were prepared and used to dilute the poisoned solu- 
tions in experiments 4 to 6. inclusive: 
(1) 3 pints beer to 1 pint molasses. 
(2) 3 pints vinegar to 1 pint molasses. 
Upon leaving Arlington, on the night of August 28, Mr. C. F. Mercer, of that city, 
was requested to make notes upon the damage done to the foliage by the several 
solutions in experiments 4 to 6, inclusive. These notes were submitted b> him in a 
letter September 1, and the facts contained are includedwith their respective experi- 
ments. 
Experiment 4. 
ttujnst 28 (4:15). — Beer, 8 ounces; cold-water solution commercial arsenic, 4 ounces. 
4 >»ji'si 29. — Foliage scorched. 
Experiment 5. 
August 2S (4:45). — Beer. 4 ounces to 2 ounces potassium cyanide solution. 
August 29. — Foliage shows no signs of damage. 
August 30 — No damage to pea vines indicated yet. 
Experiment 6. 
August 28 (4:55). — Beer, 4 ounces to 2 ounces corrosive sublimate solution. 
August 29. — Foliage wilting. 
August 30. — Dead and badly damaged. 
Notes taken during the progress of the experiments show that re- 
cently issued females or those just beginning to deposit do, in fact 
must, meet with the poisoned liquid on the vines. Soon the moths 
began to alight upon the leaves or pea pods and sip of the drops of 
sweets to the practical neglect of the blossoms. After sipping the 
moths became somewhat uncertain in their flight and soon Hew away 
and hid. It was evident to anyone familiar with their flight that the 
moths were affected and it was only a question of a short time when 
death would occur. Intact the day following the firsl three experi- 
ments dead moths could be found here and there when the pea vines 
were raised from the ground. The specimens were not old or worn out 
individuals and their death was evidently attributable to tin' poisoned 
liquid which they had sipped from the vines the evening before. 
The practicability of this remedy is somewhat lessened by the fact 
that the poisoned mixture dries rather quickly. To attain the best 
results it must be applied each day for a time during the egg-laying 
