The egg from the bottle
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Put a fresh egg in a glass of vinegar. Leave the egg in the vinegar until the hard crust dissolves and remains only an elastic membrane. Put the egg thus obtained in water. In 3-7 days, the egg will increase … Read More

The cold flame
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A handkerchief can remain whole even if the flame burns. The handkerchief is soaked in water, wring well, then soak in a mixture of water and alcohol 1: 1. This mixture is flammable but burn with a incombustible flame.