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Subject Electrolytes--Conductivity--Measurement Remove constraint Subject: Electrolytes--Conductivity--Measurement

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  1. Wooden box with black metal instrument panel; four padded metal feet on bottom; leather handle attached to side with two nickel connectors; nickel lock on side of base and lid; lid connects to base via two coated metal…

    • circa 1950

    Hardwood case with a leather handle and metal hinges and clasp; aluminium interior instrument panel has black finish; instructions on paper are inside the lid; the instrument panel features four black plastic knobs, two…