If you are using it for one of your Boy Scout requirements, see your handbook for a list of things you can teach. For most recent ILSC, our leader used making a paper airplane to demonstrate the EDGE method. What you teach should fit your audience and any requirement you are trying to fulfill. Reply.
Uses of Thallium. Thallium sulfate, which is odorless and colorless, was used as a rat poison and as an insecticide. This use has been discontinued in some countries, including the USA. Thallium sulfide is used in photocells because its electrical conductivity increases on exposure to infrared light.
Medicine. 1  Alum is used in the treatment of canker sores in the mouth, as it has a significant drying effect to the area and reduces the irritation felt at the site. 2  Alum was the major adjuvant used to increase the efficacy of vaccines, and has been used since the 1920s.