Paper Water and salt in open containers (mix and soak paper to form dielectric, which just separates the metals, for batteries) Electrical wire in two pieces (about 40 feet total, though shorter still demonstrates principle of telegraphy and longer really captures the &quot;distant&quot; meaning of &quot;tele&quot;) Flashlight bulb or electromagnet (as indicator for telegraph: either light or electromagnet that moves iron) An electromagnet can be made by winding many (100) coils of wire around an iron core (nail).
(Paper Water and salt in open containers; mix; ) (Paper Water and salt in open containers; soak; paper) (form dielectric; just separates; the metals; for batteries) (shorter; demonstrates; principle of telegraphy; T:still)
Paper Water and salt in open containers Paper Water and salt in open containers form dielectric shorter
mix soak just separates demonstrates
paper
the metals for batteries
principle of telegraphy T:still