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Auxanometer: how to measure the growth of plants

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Product Description

XIX century illustration describing the auxanometer, apparatus for measuring the growth of plants. A wire is fixed to the the plant apex on one end and a dead-weight on the other. As the plant grows, the pulley rotates and the pointer moves on a circular scale. Little is known on whether the auxanometer itself speeds up the growth by pulling the plant upwards.

JPG Raster, 3.78 MB

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