George Orwell. (2025, February 24). Wikiquote. Retrieved 18:47, March 2, 2025 from https://en.wikiquote.org/w/index.php?title=George_Orwell&oldid=3673369.
For example, application of an intense blue light to an area of physical tumescence leads to relatively rapid and easily observable reduction in the swelling while red, and to a lesser extent, yellow have quite the opposite effect.