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"If a piece of wire gauze is held over an unlighted gas jet, the gas may be lighted on either side (figure 6), but the flame will not pass through the meshes. The wires conduct the heat away so rapidly that the gas on the other side does not get hot enough to ignite. This id the principal of the safety lamp, used in coal mines where inflammable gases collect. The lamp flame is surrounded by a wire gauze, and thus kept from igniting the dangerous gases outside." Louis Derr, 1911

Two Gas Jets Beneath Wire Gauze wiPower Generation, Steamth a Lit Flame

"If a piece of wire gauze is held over an unlighted gas jet, the gas may be lighted on either side (figure…

An insulator is a material that resists the flow of electric current. An insulating material has atoms with tightly bonded valence electrons. These materials are used in parts of electrical equipment, as insulation. The term is also used to refer to insulating supports that attach electric power transmission wires to utility poles. Some materials such as glass, paper, or Teflon are very good electrical insulators.

Electric Wire Insulator

An insulator is a material that resists the flow of electric current. An insulating material has atoms…

A key used to connect wires from a battery using mercury.

Mercury Key

A key used to connect wires from a battery using mercury.