The Pamphlet Collection of Sir Robert Stout: Volume 14
- 100 gallons of water,
- 4 to 6 lbs. of soft soap,
- 4 to 6 lbs. of quassia (extract after well boiling).
Water alone would be effectual, only it runs off the web-covered leaves. The soap fixes it on them, and the bitter of the quassia makes them unpleasant to the tastes of the red spiders.