Instrument is a Geonics EM16 VLF receiver, using in the mineral exploration industry to find buried linear conductors.

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    1 month ago

    Vinegar is acetic acid. Distilled Vinegar is quite useful as a general household cleaner.

    Lemon juice contains citric acid.

    CLR or a similar product that takes care of limescale (etc) is a mixture of acids.

    Muriatic (another name for hydrochloric) acid is available from most hardware stores and can be used for dealing with rust.