| It comprises a scale graduated in millimeter 14 cm. long engraved on a plane mirror to permit parallax illumination by reflection and mounted with elevation adjustment on a support rod. The steel sprig 1 cm in diameter and 3 cm long when unstretched is suspended from a hook above the scale. Weights are not included. Pointer, scale, spring, Hanger on tripod stand. hanger |
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| AP-742-B | Hooks Law Weight A set of 20 gms N P iron nickelled weights. 4 weights of 20 gm each and one |
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