File:Heike Kamerlingh Onnes - 13 - Schematic representation of the pendulum device with a suspension of two crossed steel blades.png
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Heike_Kamerlingh_Onnes_-_13_-_Schematic_representation_of_the_pendulum_device_with_a_suspension_of_two_crossed_steel_blades.png (300 × 539 pixels, file size: 67 KB, MIME type: image/png)