This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
PSM Tremulousness of cascades of broad sheets. Tremulousness of cascades of broad sheets org PopularScienceMonthlyVolume djvu author PDold Extracted image from book to greyscale cropped whitespace ineuw PopularScienceMonthlyVolume djvu Popular Science Monthly illustrations Flowing water
Page 2023 Free-images.com. All images are Public Domain