Fresh Water Lifeforms: "Spring Comes to a Pond" 1952 12min
Elementary / Math / Ratios and Proportions
ORIGINALLY PUBLISHED BY JEFF QUITNEY (https://www.youtube.com/watch?v=gzyz4GRrNBg) Uses indigenous sounds as a background for closeups of life around a New England pond during the spring. Public domain film from the Library of Congress Prelinger Archive, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).