File:"Adding mercury to mercury- the sensational drawings by the Weber brothers as they observed the changing wave fronts made by a drop of mercury into a pool of mercury" by Weber Brosb.jpg
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"Adding_mercury_to_mercury-_the_sensational_drawings_by_the_Weber_brothers_as_they_observed_the_changing_wave_fronts_made_by_a_drop_of_mercury_into_a_pool_of_mercury"_by_Weber_Brosb.jpg (449 × 533 pixels, file size: 113 KB, MIME type: image/jpeg)