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Galvanoscope, an apparatus used to detect current and the direction that it flows, vintage line drawing or engraving illustration.
Black calorimeter, vintage engraved illustration. Industrial encyclopedia E.-O. Lami - 1875.
Torch and lamp Enameller, vintage engraved illustration. Magasin Pittoresque 1861.
DNA Pencil vector logo template. This design use chromosome symbol. Suitable for experiment or medical.
Construction of Thomsons galvonometer is much peculiar as it consists in the connection between the scale and the galvanometer, which saves much trouble in adjusting the instrument, vintage
Virtual reality experience. Technologies of the future.

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